Patent US2726067A successfully refreshed from Google Patents.
US2726067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Individual
•
Filing: 1951-10-13
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Granted: 1955-12-06
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Expires: 1971-10-13
Abstract
No abstract record available.
Inventors
- 👤 George D Wetherbee
- 👤 Eugene H Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:51
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935281A
Cited
US2135742A
Cited
US2513373A
Cited
US2529154A
Cited
US2581744A
Cited
US2584573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |