Patent US4832683A successfully refreshed from Google Patents.
US2111313A
Expired / Lapsed
US
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Rubber diaphragm and method of making the same
Assignee: Individual
•
Filing: 1937-03-26
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Granted: 1938-03-15
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Expires: 1957-03-26
Abstract
No abstract record available.
Inventors
- 👤 John T Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:35
CPC Classifications
B; B29; B29C; B29C69/00; B29C69/02; B29C70/00; B29C70/68; B29C70/70; B29K; B29K2021/00
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) | 1941-03-14 | 1941-09-13 | 1942-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-03-14 | 1945-09-13 | 1946-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-03-14 | 1949-09-13 | 1950-03-15 | $7700.00 | Window Closed / Lapsed |