Patent US2210458A successfully refreshed from Google Patents.
US2210458A
Expired / Lapsed
US
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Method of and apparatus for air conditioning
Assignee: Individual
•
Filing: 1936-11-16
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Granted: 1940-08-06
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Expires: 1956-11-16
Abstract
No abstract record available.
Inventors
- 👤 Lester S Keilholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:11
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/04; F24F1/022; F24F13/00; F24F13/02; F24F13/06; F24F2013/0616; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-08-06 | 1944-02-05 | 1944-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-06 | 1948-02-05 | 1948-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-06 | 1952-02-05 | 1952-08-06 | $7700.00 | Window Closed / Lapsed |