US2833370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaning and conditioning by thermal precipitation
Assignee: ARKLA AIR CONDITIONING Corp
•
Filing: 1951-01-12
•
Granted: 1958-05-06
•
Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas K Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:22
CPC Classifications
B; B01; B01D; B01D49/00; B01D49/02; F; F24; F24F; F24F8/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1664171A
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US2095835A
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US2093492A
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US2223669A
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US2265633A
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US2381427A
Cited
US2376859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |