Patent US2467953A successfully refreshed from Google Patents.
Patent US1997489A successfully refreshed from Google Patents.
US1997489A
Expired / Lapsed
US
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Plastic masses containing alcohol soluble polymerized vinyl compounds and process of preparing same
Assignee: CHEMISCHE FORSCHUNGS GmbH
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Filing: 1932-08-23
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Granted: 1935-04-09
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Expires: 1952-08-23
Abstract
No abstract record available.
Inventors
- 👤 Willy O Herrmann
- 👤 Haehnel Wolfram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C08L2205/00; C08L2205/14; C08L2205/16; C08L29/00; C08L29/02; C08L29/04; C08L97/00; C08L97/02
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) | 1938-04-08 | 1938-10-08 | 1939-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-08 | 1942-10-08 | 1943-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-08 | 1946-10-08 | 1947-04-09 | $7700.00 | Window Closed / Lapsed |