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Patent US2931450A successfully refreshed from Google Patents.
US2931450A
Expired / Lapsed
US
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Tandem vehicle construction
Assignee: Individual
•
Filing: 1956-08-02
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Granted: 1960-04-05
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Bear Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:04
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04; B62B3/06; B62B2207/00; B62B2207/04; B62B2301/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735253A
Cited
US707950A
Cited
US722262A
Cited
GB191420606A
Cited
US2111983A
Cited
US2114156A
Cited
US2475825A
Cited
US2726913A
Cited
US2669314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |