Patent US2501866A successfully refreshed from Google Patents.
US2501866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine for propulsion of bicycles
Assignee: Individual
•
Filing: 1946-03-23
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Granted: 1950-03-28
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Expires: 1966-03-23
Abstract
No abstract record available.
Inventors
- 👤 Gilardi Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:42
CPC Classifications
B; B62; B62M; B62M7/00; B62M7/10; B62M6/00; B62M6/10; B62M6/35; B62M9/00; H; H02; H02K; H02K21/00; H02K21/12; H02K21/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US591625A
Cited
GB189802579A
Cited
US643095A
Cited
US1191287A
Cited
US1436788A
Cited
US2031881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |