US2451973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making pneumatic tires
Assignee: Wingfoot Corp
•
Filing: 1945-01-30
•
Granted: 1948-10-19
•
Expires: 1965-01-30
Abstract
No abstract record available.
Inventors
- 👤 John F Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:49
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/02; B60C9/04; B60C9/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US778493A
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US778496A
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US790907A
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US790906A
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US1493674A
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US1453865A
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US1428040A
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US1454469A
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US1507743A
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US1579817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |