US2659703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating a synthetic rubber to form a sponge rubber and the article produced thereby
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1948-06-12
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Granted: 1953-11-17
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Expires: 1968-06-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
- 👤 William R Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/30; C08L; C08L21/00; C08J2311/00; C08J2311/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |