US2492855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting polyarylbiguanide-formaldehyde resins
Assignee: GAF Chemicals Corp
•
Filing: 1946-11-08
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Granted: 1949-12-27
•
Expires: 1966-11-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Fox
- 👤 Herbert L Sanders
- 👤 Robert T Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
C; C08; C08G; C08G73/00; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1777140A
Cited
US2013589A
Cited
US2228514A
Cited
GB520573A
Cited
US2341266A
Cited
US2331376A
Cited
US2340046A
Cited
US2427512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |