Patent US2805948A successfully refreshed from Google Patents.
US2805948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic stripping film
Assignee: GAF Chemicals Corp
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Filing: 1955-06-27
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Granted: 1957-09-10
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Francis H Gerhardt
- 👤 Benjamin R Harriman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/805
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A PHOTOGRAPHIC STRIPPING FILM COMPRISING A CELLULOSE ACETATE TEMPORARY SUPPORT, A CELLULOSE NITRATE PERMANENT SUPPORT HAVING COATED THEREON, A LIGHTT SENSITIVE SILVER HALIDE EMULSION LAYER, AND HAVING BETWEEN SAID TEMPORARY SUPPORT AND SAID PERMANENT SUPPORT, A LAYER OF A WATER-INSOLUBLE COLLOIDAL MATERIAL INCOMPATIBLE WITH AND STRIPPABLE FROM SAID TEMPORARY SUPPORT, WHEREIN SAID SILVER HALIDE EMULSION LAYER CONTAINS AS A SURFACTANT, THE CONDENSATION PRODUCT OF AT LEAST ONE MOLAR EQUIVALENT OF AN ALKYLOLAMINE OTHER THAN A PRIMARY ALKYLOLAMINE AND ONE MOLAR EQUIVALENT OF A FATTY ACID SELECTED FROM THE CLASS CONSISTING OF MONO BASIC ALIPHATIC FATTY ACIDS HAVING FROM 12 TO 22 CARBON ATOMS.
References Cited (Backward Citations)
US2370321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |