Patent US2237245A successfully refreshed from Google Patents.
US2237245A
Expired / Lapsed
US
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Inner tube
Assignee: Bridgestone Firestone Inc
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Filing: 1937-03-12
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Granted: 1941-04-01
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Expires: 1957-03-12
Abstract
No abstract record available.
Inventors
- 👤 Robert F Wilson
- 👤 Willard L Klingman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
B; B60; B60C; B60C19/00; B60C19/12; B29; B29C; B29C73/00; B29C73/16; B29C73/18; B29C73/20; B29D; B29D30/00; B29D30/06; B29D30/0681; B29D30/0685; B60C17/00; B60C17/01; B60C17/02; B60C5/00; B60C5/20; B60C5/22; B29D2030/0686; B29D2030/0695; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10279; Y10T152/10378; Y10T152/10387; Y10T152/10396; Y10T152/10405; Y10T152/10495; Y10T152/10522; Y10T152/10576; Y10T152/10612
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) | 1944-03-31 | 1944-09-30 | 1945-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-31 | 1948-09-30 | 1949-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-31 | 1952-09-30 | 1953-04-01 | $7700.00 | Window Closed / Lapsed |