US4207288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoinitiator system for photopolymerizable compositions
Assignee: Armstrong World Industries Inc
•
Filing: 1978-04-10
•
Granted: 1980-06-10
•
Expires: 1998-04-10
Abstract
Abstract An apparatus for measuring an exothermic reaction in a thin film of a photopolymerizable, ethylenically-unsaturated mass, which apparatus comprises a thin foil differential thermocouple means, a pore means adjacent to and mounted above the thermocouple means, a perforated plate means positioned above the pore means and an ultraviolet light source means positioned above the plate means is disclosed.
Inventors
- 👤 Caroline A. Cauler
- 👤 Richard M. Fantazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:50
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/44; G01N33/442; C; C08; C08F; C08F2/00; C08F2/46; G01K; G01K7/00; G01K7/02; G01N25/00; G01N25/20; G01N25/48; G01N25/4806; G01N25/4813; G01N25/482
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
An apparatus for measuring an exothermic reaction in a photopolymerizable, ethylenically-unsaturated mass which apparatus comprises: (a) a thin foil differential thermocouple means; a thin, small pore means capable of retaining said photopolymerizable, ethylenically-unsaturated mass adjacent to and mounted above said thermocouple means; (c) a perforated plate means opaque to ultraviolet light positioned above said small pore means; and (d) an ultraviolet light source means positioned above said plate means, said above four means being positioned one above to other to permit the ultraviolet light source means to pass ultraviolet light rays through said perforated plate means and irradiate said mass mounted on said pore means.
Claim 2
Independent Claim
105 words
An apparatus for measuring an exothermic reaction in a photopolymerizable, ethylenically-unsaturated mass which apparatus comprises: (a) a thin foil differential thermocouple means; a thin, small pore means capable of retaining said photopolymerizable, ethylenically-unsaturated mass adjacent to and mounted above said thermocouple means; (c) a perforated plate means opaque to ultraviolet light positioned above said small pore means; and (d) an ultraviolet light source means positioned above said plate means, said above four means being positioned one above to other to permit the ultraviolet light source means to pass ultraviolet light rays through said perforated plate means and irradiate said mass mounted on said pore means.
Claim 3
Dependent Claim
40 words
The apparatus of claim 1 wherein said thin foil differential thermocouple is from 0.0005 to 0.050 inch in thickness and said thin, small pore means is screen of 8 to 10 mesh and from 0.002 to 0.010 inch in thickness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |