US4633003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane monomers for ophthalmic applications
Assignee: Alcon Research LLC
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Filing: 1985-11-25
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Granted: 1986-12-30
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Expires: 2005-11-25
Abstract
Abstract Novel colorless siloxane monomers containing both an aromatic ring and vinyl functionality are employed as a monomer for preparing copolymers that are ophthalmically useful. The monomer has good oxygen permeability, allows preparation of copolymers that have good machineability, and is easily wettable. Moreover, because of its compatability with other copolymers it can be useful to make a wide variety of types of lenses including hard and soft, and ocular implants as well.
Inventors
- 👤 Joseph J. Falcetta
- 👤 Joonsup Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:02
CPC Classifications
C; C08; C08F; C08F30/00; C08F30/04; C08F30/08; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A siloxane monomer having the formula: ##STR5## wherein, (1) "A" is selected from the group consisting of: ##STR6## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR7## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five.
Claim 2
Dependent Claim
94 words
A siloxane monomer having the formula: ##STR5## wherein, (1) "A" is selected from the group consisting of: ##STR6## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR7## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five.
Claim 3
Dependent Claim
12 words
The siloxane monomer of claim 1 wherein A is an ester group.
Claim 4
Dependent Claim
12 words
The siloxane monomer of claim 1 wherein A is an amide group.
Claim 5
Dependent Claim
12 words
The siloxane monomer of claim 1 wherein A is a ureido group.
Claim 6
Dependent Claim
11 words
The siloxane of claim 1 wherein X and Y are methyl.
Claim 7
Dependent Claim
9 words
The siloxane of claim 1 wherein W is trimethylsiloxyl.
Claim 8
Dependent Claim
9 words
The siloxane of claim 1 wherein W is pentamethyldisiloxyl.
Claim 9
Dependent Claim
30 words
The monomer of claim 1 wherein: A is an ester group, R is methyl, X and Y are: --OSi(Ch 3 ) 3 , Z is methyl and R is 1.
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |