US2819023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: BUENSOD STACEY Inc
•
Filing: 1952-02-27
•
Granted: 1958-01-07
•
Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Harrison W Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:27
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US699352A
Cited
US1954903A
Cited
US2123440A
Cited
US2225956A
Cited
US2284764A
Cited
US2255735A
Cited
US2241108A
Cited
US2609183A
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 |