Patent US2374812A successfully refreshed from Google Patents.
US2374812A
Expired / Lapsed
US
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Method of producing modified urea aldehyde resin
Assignee: Falk and Co
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Filing: 1943-08-14
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Granted: 1945-05-01
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Expires: 1963-08-14
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Gutkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:22
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08L; C08L67/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-04-30 | 1948-10-30 | 1949-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-30 | 1952-10-30 | 1953-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-30 | 1956-10-30 | 1957-05-01 | $7700.00 | Window Closed / Lapsed |