US2894368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas engine comprising more than one device for the supply of heat
Assignee: US Philips Corp
•
Filing: 1953-03-19
•
Granted: 1959-07-14
•
Expires: 1973-03-19
Abstract
No abstract record available.
Inventors
- 👤 Willem Jan Van Heeckeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:58
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2518996A
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US2682922A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |