US2146295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerized vinyl alcohol articles and process of making same
Assignee: CHEMISCHE FORSCHUNGS GmbH
•
Filing: 1935-12-21
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Granted: 1939-02-07
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Expires: 1955-12-21
Abstract
No abstract record available.
Inventors
- 👤 Willy O Hermann
- 👤 Baum Erich
- 👤 Hehnel Wolfram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; Y; Y10; Y10S; Y10S264/00; Y10S264/73
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) | 1942-02-06 | 1942-08-08 | 1943-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-06 | 1946-08-08 | 1947-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-06 | 1950-08-08 | 1951-02-07 | $7700.00 | Window Closed / Lapsed |