Patent US3136638A successfully refreshed from Google Patents.
US3136638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive stencil and process of making the same
Assignee: GAF Chemicals Corp
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Filing: 1959-06-26
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Granted: 1964-06-09
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Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Andre K Schwerin
- 👤 Walter F Burrows
- 👤 Helene D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A PHOTOSENSITIVE STENCIL COMPRISING FIBROUS STENCIL SCREEN MATERIAL HAVING A PHOTOSENSITIVE COATING THEREON COMPRISING ACRYLAMIDE, N,N''-METHYLENE-BIS-ACRYLAMIDE AND FERRIC AMMONIUM CITRATE DISPERSED IN A WATER SOLUBLE COLLOIDAL CARRIER.
Claim 2
Dependent Claim
27 words
A PHOTOSENSITIVE STENCIL COMPRISING FIBROUS STENCIL SCREEN MATERIAL HAVING A PHOTOSENSITIVE COATING THEREON COMPRISING ACRYLAMIDE, N,N''-METHYLENE-BIS-ACRYLAMIDE AND FERRIC AMMONIUM CITRATE DISPERSED IN A WATER SOLUBLE COLLOIDAL CARRIER.
References Cited (Backward Citations)
US2291130A
Cited
US2344785A
Cited
US2413973A
Cited
GB665649A
Cited
US2661331A
Cited
US2927021A
Cited
US2997391A
Cited
US3101270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |