Patent US2379167A successfully refreshed from Google Patents.
Patent US1996216A successfully refreshed from Google Patents.
US1996216A
Expired / Lapsed
US
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New celluloid like artificial compound of a polyvinyl alcohol aldehyde condensation product
Assignee: Individual
•
Filing: 1931-10-29
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Granted: 1935-04-02
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Expires: 1951-10-29
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:45
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/14; B; B29; B29K; B29K2001/00; B29L; B29L2031/00; B29L2031/52; B29L2031/5209; B29L2031/5218; Y; Y10; Y10S; Y10S206/00; Y10S206/819
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) | 1938-04-01 | 1938-10-01 | 1939-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-01 | 1942-10-01 | 1943-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-01 | 1946-10-01 | 1947-04-02 | $7700.00 | Window Closed / Lapsed |