US1473486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: AMBROSE E ELLIOTT
•
Filing: 1922-03-03
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Granted: 1923-11-06
•
Expires: 1942-03-03
Abstract
No abstract record available.
Inventors
- 👤 Walter F Mccallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:17
CPC Classifications
F; F02; F02B; F02B25/00; F02B2720/00; F02B2720/13; F02B2720/131
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) | 1926-11-05 | 1927-05-07 | 1927-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-05 | 1931-05-07 | 1931-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-05 | 1935-05-07 | 1935-11-06 | $7700.00 | Window Closed / Lapsed |