US2796743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural stage air conditioning system
Assignee: Individual
•
Filing: 1954-03-11
•
Granted: 1957-06-25
•
Expires: 1974-03-11
Abstract
No abstract record available.
Inventors
- 👤 Alden I Mcfarlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:23
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F25B2400/00; F25B2400/06; F25B2400/22; F25B29/00; F25B29/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2204394A
Cited
US2168157A
Cited
US2296741A
Cited
US2286605A
Cited
US2233633A
Cited
US2463881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |