Patent US3601705A successfully refreshed from Google Patents.
US1985997A
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Celluloid article and method of making same
Assignee: DuPont Viscoloid Co
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Filing: 1932-06-29
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Granted: 1935-01-01
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Expires: 1952-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles R Keeran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:06
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/02; B29C63/04; B29C63/08; B29C63/10; B29C63/105; B29C53/00; B29C53/36; B29C53/38; B29C53/385; B29C53/56; B29C53/566; B29C53/58; B29C53/581; B29C67/00; B29C67/0014; B29C69/00; B29C48/00; B29C48/03; B29C48/09; B29C48/12; B29C48/15
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) | 1937-12-31 | 1938-07-02 | 1939-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-31 | 1942-07-02 | 1943-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-31 | 1946-07-02 | 1947-01-01 | $7700.00 | Window Closed / Lapsed |