US3392541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural compressor reverse cycle refrigeration or heat pump system
Assignee: Larkin Coils Inc
•
Filing: 1967-02-06
•
Granted: 1968-07-16
•
Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Otto J Nussbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25B47/025; F25B13/00; F25B49/00; F25B49/02; F25B49/027; F25B7/00; F25B2400/00; F25B2400/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241033A
Cited
US2241060A
Cited
US2221688A
Cited
US2769314A
Cited
US2919558A
Cited
US3103794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |