US1508342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacture of air-cooled cylinders
Assignee: General Motors Research Corp
•
Filing: 1922-11-08
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Granted: 1924-09-09
•
Expires: 1942-11-08
Abstract
No abstract record available.
Inventors
- 👤 Charles L Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:08
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/53; Y10T29/53796
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) | 1927-09-09 | 1928-03-10 | 1928-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-09 | 1932-03-10 | 1932-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-09 | 1936-03-10 | 1936-09-09 | $7700.00 | Window Closed / Lapsed |