Patent US3408725A successfully refreshed from Google Patents.
US3408725A
Expired / Lapsed
US
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Heat motor
Assignee: TDK Micronas GmbH
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Filing: 1966-05-24
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Granted: 1968-11-05
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Expires: 1986-05-24
Abstract
No abstract record available.
Inventors
- 👤 Richard D Grayson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; F; F03; F03G; F03G7/00; F03G7/06; F03G7/061; F03G7/06114; G01; G01K; G01K5/00; G01K5/32; G01K5/42; G05D23/19; G05D23/1919; G05D23/1921; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/36; H01H37/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |