Patent US1680171A successfully refreshed from Google Patents.
US1680171A
Expired / Lapsed
US
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Apparatus for use in rubber factories
Assignee: Individual
•
Filing: 1923-09-22
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Granted: 1928-08-07
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Expires: 1943-09-22
Abstract
No abstract record available.
Inventors
- 👤 Oscar D Hollenbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:01
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/64; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/286; B29C48/288; B29C48/2888; B29C48/03; B29C48/09
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) | 1931-08-07 | 1932-02-06 | 1932-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-07 | 1936-02-06 | 1936-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-07 | 1940-02-06 | 1940-08-07 | $7700.00 | Window Closed / Lapsed |