Patent US3280907A successfully refreshed from Google Patents.
US3280907A
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Energy transfer device
Assignee: Individual
•
Filing: 1964-09-01
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Granted: 1966-10-25
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:47
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191411278A
Cited
GB313623A
Cited
US2651251A
Cited
US2653800A
Cited
US2726850A
Cited
US2997858A
Cited
US2838740A
Cited
FR1206000A
Cited
US2965819A
Cited
US2964688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |