US1730659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocatory-piston machine
Assignee: Individual
•
Filing: 1928-12-06
•
Granted: 1929-10-08
•
Expires: 1948-12-06
Abstract
No abstract record available.
Inventors
- 👤 Oscar B Johnson
- 👤 Harry M Kortright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:47
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/227; F01; F01B; F01B9/00; F01B9/04; F01B9/06; F01B2009/061; F01B2009/065; F02B2275/00; F02B2275/20; F02B73/00; F02B75/222; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/1828
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) | 1932-10-07 | 1933-04-08 | 1933-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-07 | 1937-04-08 | 1937-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-07 | 1941-04-08 | 1941-10-08 | $7700.00 | Window Closed / Lapsed |