US2902939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooler pump
Assignee: Lennox Industries Inc
•
Filing: 1958-05-09
•
Granted: 1959-09-08
•
Expires: 1978-05-09
Abstract
No abstract record available.
Inventors
- 👤 Elton T Massingill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:11
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/62; F04D29/628; F04D7/00; F04D7/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2098621A
Cited
US2701529A
Cited
US2791182A
Cited
US2782720A
Cited
US2747513A
Cited
US2884863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |