US2461449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump using deep well for a heat source
Assignee: MUNCIE GEAR WORKS Inc
•
Filing: 1946-10-14
•
Granted: 1949-02-08
•
Expires: 1966-10-14
Abstract
No abstract record available.
Inventors
- 👤 Marvin M Smith
- 👤 Emory N Kemler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
F; F25; F25B; F25B30/00; F25B30/06; F24; F24T; F24T10/00; F24T10/20; F24T10/30; Y; Y02; Y02E; Y02E10/00; Y02E10/10; Y10; Y10S; Y10S159/00; Y10S159/902; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/877; Y10T137/87708
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1482376A
Cited
US1957624A
Cited
US1816260A
Cited
US2167878A
Cited
US2214064A
Cited
US2401890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |