Patent US2815988A successfully refreshed from Google Patents.
US2815988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless tracks for vehicles
Assignee: Dunlop Rubber Co Ltd
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Filing: 1954-01-19
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Granted: 1957-12-10
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Expires: 1974-01-19
Abstract
No abstract record available.
Inventors
- 👤 Dowell Peter Thomas George
- 👤 Pumphrey Howard Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24; B62D55/253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1014612A
Cited
US1966450A
Cited
US1949423A
Cited
US2385453A
Cited
US2338550A
Cited
US2410507A
Cited
US2592916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |