US2956845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: Individual
•
Filing: 1956-05-09
•
Granted: 1960-10-18
•
Expires: 1976-05-09
Abstract
No abstract record available.
Inventors
- 👤 Gunnar A Wahlmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/14; F04B1/141; F04B1/143; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F02; F02B; F02B75/00; F02B75/26; F04B1/122; F04B1/124; F16; F16J; F16J1/00; F16J1/09; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US394789A
Cited
US580848A
Cited
US1612038A
Cited
US1710567A
Cited
FR761049A
Cited
FR800418A
Cited
US2148764A
Cited
FR886967A
Cited
US2376475A
Cited
US2465510A
Cited
US2495685A
Cited
US2426108A
Cited
US2658809A
Cited
US2710137A
Cited
US2610098A
Cited
US2792790A
Cited
US2716971A
Cited
US2815992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |