Patent US2994611A successfully refreshed from Google Patents.
US2994611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening of protein
Assignee: Hoechst AG
•
Filing: 1959-03-13
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Granted: 1961-08-01
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Expires: 1979-03-13
Abstract
No abstract record available.
Inventors
- 👤 Heyna Johannes
- 👤 Berlin Ludwig Wilhelm
- 👤 Schinzel Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
PHOTOGRAPHIC GELATINE CONTAINING SILVER HALIDE AND HARDENED BY THE ADDITION THERETO OF A SUBSTITUTED BENZENE COMPOUND HAVING 2 TO 3 VINYL SULFONYL GROUPS (-SO2CH=CH2) SUBSTITUTED ON THE BENZENE NUCLEUS IN O-POSITION RELATIVE TO EACH OTHER.
Claim 2
Dependent Claim
35 words
PHOTOGRAPHIC GELATINE CONTAINING SILVER HALIDE AND HARDENED BY THE ADDITION THERETO OF A SUBSTITUTED BENZENE COMPOUND HAVING 2 TO 3 VINYL SULFONYL GROUPS (-SO2CH=CH2) SUBSTITUTED ON THE BENZENE NUCLEUS IN O-POSITION RELATIVE TO EACH OTHER.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |