US3313784A
Expired / Lapsed
US
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Hardening of polymers containing carboxyl groups
Assignee: Gevaert Photo Producten NV
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Filing: 1962-07-09
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Granted: 1967-04-11
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Vrancken Marcel Nicolas
- 👤 Willems Jozef Frans
- 👤 August Jean Van Paesschen
- 👤 Lemmerling Jose Therese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:29
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0592; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/10; C08B11/12; C08B15/00; C08B15/10; C08B31/00; C08B35/00; C08B35/02; C08B37/00; C08B37/006; C08B37/0084; C08F; C08F8/00; C08K; C08K5/00; C08K5/0008; C08K5/0025; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE METHOD OF HARDENING A POLYMER CONTAINING CARBOXYL GROUPS, WHICH METHOD COMPRISES CONTACTING SAID POLYMER WITH A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
21 words
THE METHOD OF HARDENING A POLYMER CONTAINING CARBOXYL GROUPS, WHICH METHOD COMPRISES CONTACTING SAID POLYMER WITH A COMPOUND HAVING THE FORMULA
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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |