Patent US2920464A successfully refreshed from Google Patents.
US2920464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled condensing unit
Assignee: INTERNATIONAL HEATER CO
•
Filing: 1957-02-28
•
Granted: 1960-01-12
•
Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Trask Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/06; F24F1/38; F24F1/46; F24F1/48; F24F1/50; F24F1/56; F24F5/00; F24F5/0007; F24F5/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2342566A
Cited
US1589412A
Cited
US1672086A
Cited
US2234753A
Cited
US1974317A
Cited
US2285075A
Cited
US2293718A
Cited
US2277247A
Cited
US2304359A
Cited
US2369511A
Cited
US2475841A
Cited
US2513644A
Cited
US2648202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |