US3020974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating air
Assignee: Carrier Corp
•
Filing: 1960-01-28
•
Granted: 1962-02-13
•
Expires: 1980-01-28
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Hungate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F2003/144; F24F6/00; F24F6/12; F24F6/14; F24F2006/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1190386A
Cited
US1480775A
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US1511834A
Cited
US1875711A
Cited
US1833674A
Cited
AU1567533A
Cited
US2184731A
Cited
US2195707A
Cited
US2596782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |