US2672734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1950-11-07
•
Granted: 1954-03-23
•
Expires: 1970-11-07
Abstract
No abstract record available.
Inventors
- 👤 John L Ditzler
- 👤 Gerald L Biehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2218793A
Cited
US2342566A
Cited
US2289035A
Cited
US2148415A
Cited
US2093834A
Cited
US2096967A
Cited
US2218597A
Cited
US2143687A
Cited
US2241060A
Cited
US2280512A
Cited
US2351140A
Cited
US2468626A
Cited
US2525560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |