Patent US1728749A successfully refreshed from Google Patents.
US1728749A
Expired / Lapsed
US
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Explosion chamber of the cylinders of internal-combustion engines
Assignee: Individual
•
Filing: 1927-12-22
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Granted: 1929-09-17
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Expires: 1947-12-22
Abstract
No abstract record available.
Inventors
- 👤 Elliott Albert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:51
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; F02B23/00; F02B23/08; F02F; F02F1/00; F02F1/24; F02F1/242; F02B2023/085; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1932-09-16 | 1933-03-18 | 1933-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-16 | 1937-03-18 | 1937-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-16 | 1941-03-18 | 1941-09-17 | $7700.00 | Window Closed / Lapsed |