US3015221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump in absorption refrigeration machine
Assignee: Individual
•
Filing: 1958-03-31
•
Granted: 1962-01-02
•
Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Frank M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/025; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1882252A
Cited
US1866825A
Cited
US1934690A
Cited
US2104847A
Cited
US2146077A
Cited
US2146078A
Cited
US2776548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |