US4886338A
Expired / Lapsed
US
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Optical fiber event sensor
Assignee: Terumo Cardiovascular Systems Corp
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Filing: 1988-10-11
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Granted: 1989-12-12
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Expires: 2008-10-11
Abstract
Abstract A micro pH sensor is constructed by reacting powdered aminoalkylated cellulose with a dye to covalently bond the dye to the aminoalkyl groups on the cellulose. Any excess unreacted aminoalkyl groups are blocked with a blocking agent and the dye containing powdered cellulose is taken up in a solvent. A portion of the solvated dye containing cellulose is deposited in association with an optical fiber. The cellulose is regenerated into a solid matrix by acid treatment of the solvated dye containing cellulose to deposit the dye containing celllulose matrix on the optical fiber.
Inventors
- 👤 Masao Yafuso
- 👤 Henry K. Hui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/643; G01N2021/6434; G01N2021/6439; G01N21/645; G01N2021/6484; G01N21/75; G01N21/77; G01N2021/7769; G01N2021/7786
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
59 words
An event sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated polymeric material; a plurality of event sensing dye groups, said event sensing dye groups chemically bound to said polymeric material; and said matrix of said regenerated polymeric material formed in situ on said optical surface of said optical fiber.
Claim 2
Dependent Claim
59 words
An event sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated polymeric material; a plurality of event sensing dye groups, said event sensing dye groups chemically bound to said polymeric material; and said matrix of said regenerated polymeric material formed in situ on said optical surface of said optical fiber.
Claim 3
Dependent Claim
60 words
An event sensor of claim 1 wherein: said event sensing dye groups are covalently bound to said polymeric material, and said matrix of said regenerated polymeric material is formed by depositing said polymeric material in solution in a carrier solvent on said optical fiber and regenerating said polymeric material from said solution to form said matrix on said optical fiber.
Claim 4
Dependent Claim
30 words
An event sensor of claim 2 wherein: said polymeric material is cellulose; and said polymeric material is regenerated by contacting said solution on said optical fiber with an acid solution.
Claim 5
Dependent Claim
48 words
At event sensor of claim 3 further including: a plurality of substituent groups located on said cellulose; and each of said plurality of event sensing dye groups covalently bound to said cellulose by covalently bounding each of said event sensing dye groups to one of said substituent groups.
Claim 6
Dependent Claim
22 words
An event sensor of claim 4 wherein: said dye is a pH sensitive dye; and said event sensor is a pH sensor.
Claim 7
Dependent Claim
78 words
An event sensor of claim 1 further including: a plurality of substituent groups located on said polymeric material, each of said plurality of event sensing dye groups chemically bound to said polymeric material by chemically bonding each of said event sensing dye groups to one of said substituent groups; and a plurality of substituent group blocking groups, said plurality of substituent group blocking groups located on said substituent groups which do not have a dye group attached thereto.
Claim 8
Dependent Claim
30 words
An event sensor of claim 1 further including; and overcoating, said overcoating comprising cellulose containing an opaque agent in said cellulose, said overcoating covering said matrix on said optical fiber.
Claim 9
Dependent Claim
136 words
A pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber; a plurality of substituent groups located on said cellulose; a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said substituent groups; and a plurality of substituent group blocking groups located on essentially any of said plurality of substituent groups which does not have a dye group attached thereto.
Claim 10
Dependent Claim
136 words
A pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber; a plurality of substituent groups located on said cellulose; a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said substituent groups; and a plurality of substituent group blocking groups located on essentially any of said plurality of substituent groups which does not have a dye group attached thereto.
Claim 11
Dependent Claim
15 words
The pH sensor of claim 8 wherein said substituent group blocking groups comprise acylating groups.
Claim 12
Dependent Claim
127 words
The pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber; a plurality of aminoalkyl groups located on said cellulose; a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said aminoalkyl groups with sulfonylamido linkage, said plurality of pH sensitive dye groups being less than said plurality of aminoalkyl groups
Claim 13
Dependent Claim
127 words
The pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber; a plurality of aminoalkyl groups located on said cellulose; a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said aminoalkyl groups with sulfonylamido linkage, said plurality of pH sensitive dye groups being less than said plurality of aminoalkyl groups
Claim 14
Dependent Claim
129 words
A pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber, said solution further containing glycerol in an amount effective to enhance the permeability of said matrix to ionic species; a plurality of substituent groups located on said cellulose; and a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said substituent groups.
Claim 15
Dependent Claim
129 words
A pH sensor which comprises: an optical fiber, said optical fiber having an optical surface; a matrix of a regenerated cellulose formed in situ on said optical surface of said optical fiber by depositing a droplet of cellulose in solution in a carrier solvent on said optical fiber and regenerating said cellulose from said solution by treating said carrier solvent with an acid solution regeneration reagent to form said matrix on said optical fiber, said solution further containing glycerol in an amount effective to enhance the permeability of said matrix to ionic species; a plurality of substituent groups located on said cellulose; and a plurality of pH sensitive dye groups attached to said cellulose by attaching each of said pH sensitive dye groups to one of said substituent groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |