Patent US2354672A successfully refreshed from Google Patents.
US2354672A
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Nitrogenous resin from catechol type tannins
Assignee: Resinous Products and Chemical Co
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Filing: 1941-04-09
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Granted: 1944-08-01
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Expires: 1961-04-09
Abstract
No abstract record available.
Inventors
- 👤 John W Eastes
- 👤 Averill Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0293; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; C08G14/00; C08G14/02; C08G14/04; C08G14/06
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) | 1947-08-01 | 1948-01-31 | 1948-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-01 | 1952-01-31 | 1952-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-01 | 1956-01-31 | 1956-08-01 | $7700.00 | Window Closed / Lapsed |