US3484616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirling cycle machine with self-oscillating regenerator
Assignee: McDonnell Douglas Corp
•
Filing: 1968-02-01
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Granted: 1969-12-16
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Expires: 1988-02-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Baumgardner
- 👤 Richard P Johnston
- 👤 William R Martini
- 👤 Maurice A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/0435; F02G1/053; F02G1/057; F02G2250/00; F02G2250/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US278446A
Cited
US1675829A
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US1614961A
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US1895082A
Cited
US2157229A
Cited
US2907169A
Cited
US3074596A
Cited
US3220178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |