US3418825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cdr combination high and low pressure power injection heating and refrigeration machine and method
Assignee: Individual
•
Filing: 1967-03-07
•
Granted: 1968-12-31
•
Expires: 1987-03-07
Abstract
No abstract record available.
Inventors
- 👤 Carl D Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:33
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B49/00; F25B49/04; F25B49/043; F25B2315/00; F25B2315/001; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2930204A
Cited
US2929222A
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US3015221A
Cited
US3046756A
Cited
US3266266A
Cited
US3293881A
Cited
US3320760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |