US2290736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of sponge rubber
Assignee: Mishawaka Rubber and Woollen Manufacturing Co
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Filing: 1935-02-27
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Granted: 1942-07-21
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Expires: 1955-02-27
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R Buffington
- 👤 Ellery K Files
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08L; C08L21/00; C08J2321/00; C08J2489/00
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) | 1945-07-20 | 1946-01-19 | 1946-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-20 | 1950-01-19 | 1950-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-20 | 1954-01-19 | 1954-07-21 | $7700.00 | Window Closed / Lapsed |