USRE26596E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump controls
Assignee: —
•
Filing: 1967-09-20
•
Granted: 1969-06-03
•
Expires: 1987-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:16
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25B; F25B47/00; F25B47/02; F25B47/022; F25B47/025; F25B13/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/275; F25B2313/00; F25B2313/025; F25B2313/029; F25B2313/0292; F25B2313/0293; F25B2313/0294; F25B2400/00; F25B2400/07; F25B2400/075; F25B2600/00; F25B2600/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |