US1544974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston-ring compressor
Assignee: M E CURTIS
•
Filing: 1924-06-03
•
Granted: 1925-07-07
•
Expires: 1944-06-03
Abstract
No abstract record available.
Inventors
- 👤 Charles R Gillis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/12; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/536
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) | 1928-07-06 | 1929-01-05 | 1929-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-07-06 | 1933-01-05 | 1933-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-07-06 | 1937-01-05 | 1937-07-07 | $7700.00 | Window Closed / Lapsed |