Patent US673462A successfully refreshed from Google Patents.
US673462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air motor.
Assignee: Individual
•
Filing: 1897-12-29
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Granted: 1901-05-07
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Expires: 1917-12-29
Abstract
No abstract record available.
Inventors
- 👤 John E Thornton
- 👤 James P Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:23
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/024; F02; F02G; F02G1/00; F02G1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1904-05-06 | 1904-11-05 | 1905-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-05-06 | 1908-11-05 | 1909-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-05-06 | 1912-11-05 | 1913-05-07 | $7700.00 | Window Closed / Lapsed |