Patent US2661249A successfully refreshed from Google Patents.
US2661249A
Expired / Lapsed
US
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Endless track composed of rubber bonded to flexible metal bands
Assignee: "E S T" SCIENCES TECHNIQUES Ets
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Filing: 1948-09-01
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Granted: 1953-12-01
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Expires: 1968-09-01
Abstract
No abstract record available.
Inventors
- 👤 Bonmartini Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/38; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24; B62D55/244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2416679A
Cited
US1411523A
Cited
US1460656A
Cited
US1820882A
Cited
US2055932A
Cited
US2169443A
Cited
US2337074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |