US3020822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained air conditioning units
Assignee: Carrier Corp
•
Filing: 1959-11-09
•
Granted: 1962-02-13
•
Expires: 1979-11-09
Abstract
No abstract record available.
Inventors
- 👤 Harold H Hopkinson
- 👤 Maurice D Irwin
- 👤 Vernon R Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:26
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/029; F24F1/032; F24F1/0323; F24F1/0328; F24F1/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2220594A
Cited
US1650946A
Cited
US2016422A
Cited
US2044098A
Cited
US2656780A
Cited
US2566156A
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 |