US3448791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatuses for energy transfer
Assignee: Individual
•
Filing: 1965-05-20
•
Granted: 1969-06-10
•
Expires: 1985-05-20
Abstract
No abstract record available.
Inventors
- 👤 James Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:29
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/192; B; B64; B64G; B64G1/00; B64G1/22; B64G1/46; B64G1/50; F; F28; F28F; F28F27/00; H; H10; H10N; H10N15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB635784A
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US3302703A
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US3242982A
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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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |