US3413815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-actuated regenerative compressor for refrigerating systems
Assignee: American Gas Association Inc
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Filing: 1966-05-02
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Granted: 1968-12-03
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Eric G U Granryd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; F25B9/004; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F24; F24F; F24F5/00; F25B1/00; F25B27/00; F25B31/00; F25B2309/00; F25B2309/06; F25B2309/061; F25B9/008
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |