US3492813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas reciprocating engine with cooled rolling diaphragm seal
Assignee: US Philips Corp
•
Filing: 1968-05-29
•
Granted: 1970-02-03
•
Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Roelf Jan Meijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/0535; F02G2243/00; F02G2243/02; F02G2243/04; F02G2243/08; F02G2253/00; F02G2253/08; F02G2253/10; F02G2253/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3318100A
Cited
US3372624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |