US3496720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas engine with solid cap on expansion piston
Assignee: US Philips Corp
•
Filing: 1968-02-05
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Granted: 1970-02-24
•
Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 Gregorius Theodorus Mar Neelen
- 👤 Roelf Jan Meijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:23
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/05; F02G2258/00; F02G2258/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190718627A
Cited
US1073065A
Cited
US1240862A
Cited
US1751350A
Cited
US1904070A
Cited
US2413751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |