Patent US4135868A successfully refreshed from Google Patents.
US2456580A
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US
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Method of making transmission belts
Assignee: Wingfoot Corp
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Filing: 1944-01-24
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Granted: 1948-12-14
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Expires: 1964-01-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Carter
- 👤 Marvin L Dorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
B; B29; B29D; B29D29/00; B29D29/10; B29C; B29C33/00; B29C45/00; B29C45/14; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1924083A
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US1969067A
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US2216863A
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US2235906A
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US2211202A
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US2292290A
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US2337985A
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US2362659A
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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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |