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US1623901A
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Method for the improvement of natural resins
Assignee: FIRM CHEMISCHE FABRIKEN DR KUR
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Filing: 1924-02-04
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Granted: 1927-04-05
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Expires: 1944-02-04
Abstract
No abstract record available.
Inventors
- 👤 Amann August
- 👤 Fonrobert Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:24
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0225; C08G8/00; C08G8/04; C08G8/08; C08G8/12; C08G8/28; C08G8/34; C09; C09F; C09F1/00
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) | 1930-04-04 | 1930-10-04 | 1931-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-04-04 | 1934-10-04 | 1935-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-04-04 | 1938-10-04 | 1939-04-05 | $7700.00 | Window Closed / Lapsed |