Patent US2156508A successfully refreshed from Google Patents.
US2156508A
Expired / Lapsed
US
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Process of making sponge rubber
Assignee: IND PROCESS CORP
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Filing: 1936-05-16
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Granted: 1939-05-02
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Expires: 1956-05-16
Abstract
No abstract record available.
Inventors
- 👤 Henry R Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29C44/3446; B29C44/3484; C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/122; C08L; C08L21/00; C08J2201/00; C08J2201/02; C08J2201/03; C08J2321/00
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |