US1813235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing rubber articles
Assignee: Cambridge Rubber Co
•
Filing: 1926-07-31
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Granted: 1931-07-07
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Expires: 1946-07-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:50
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/12; B29D35/14; B29D35/142; 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) | 1934-07-06 | 1935-01-05 | 1935-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-06 | 1939-01-05 | 1939-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-06 | 1943-01-05 | 1943-07-07 | $7700.00 | Window Closed / Lapsed |