Patent US3424232A successfully refreshed from Google Patents.
US3424232A
Expired / Lapsed
US
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Heating and cooling system
Assignee: WALTER A GARRETT
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Filing: 1967-10-24
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Granted: 1969-01-28
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Expires: 1987-10-24
Abstract
No abstract record available.
Inventors
- 👤 Walter A Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:19
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0046; F24D; F24D5/00; F24D5/02; F24D5/04; F24F5/005; F24F7/00; Y; Y02; Y02B; Y02B10/00; Y02B10/40; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2680354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |