US2844131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating piston machine
Assignee: Individual
•
Filing: 1956-04-16
•
Granted: 1958-07-22
•
Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Beveridge John Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/34; F02B25/00; F02B25/14; F02B25/145; F02B1/00; F02B1/02; F02B1/04; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/027; F02B2720/00; F02B2720/13; F02B2720/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229989A
Cited
US1217020A
Cited
US1455787A
Cited
US1542697A
Cited
US1744161A
Cited
US1795551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |