US2984460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined heating and cooling system
Assignee: ITT Bell and Gossett Inc
•
Filing: 1956-05-21
•
Granted: 1961-05-16
•
Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Donald B Gardner
- 👤 Maurice H Hofmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/10; F24D3/1091; F24F; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F24F3/00; F24F3/06; F24F5/00; F24F5/0003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315766A
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US2255292A
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US1980688A
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US2004843A
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US2115706A
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US2200620A
Cited
US2469616A
Cited
US2555012A
Cited
US2650031A
Cited
US2713973A
Cited
US2751152A
Cited
US2746724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |