Patent US3046732A successfully refreshed from Google Patents.
US3046732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of energy exchange and apparatus for carrying out the same
Assignee: Research Corp
•
Filing: 1956-06-20
•
Granted: 1962-07-31
•
Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Foa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:20
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/18
Claims Analysis
Total Claims: 0
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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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |