Patent US2819044A successfully refreshed from Google Patents.
US2819044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-conditioning apparatus
Assignee: Individual
•
Filing: 1955-08-30
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Granted: 1958-01-07
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Bungas George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US580795A
Cited
US1704535A
Cited
US1747134A
Cited
US1875752A
Cited
US1747070A
Cited
US2216175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |