Patent US2619894A successfully refreshed from Google Patents.
US2619894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Individual
•
Filing: 1949-06-06
•
Granted: 1952-12-02
•
Expires: 1969-06-06
Abstract
No abstract record available.
Inventors
- 👤 Knepper Bonnie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:09
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/028; F24F1/03; F24F1/031; F24F1/0328; F24F1/035; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F8/00; F24F8/20; F24F8/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911744A
Cited
US345694A
Cited
US2234771A
Cited
US1324973A
Cited
US302215A
Cited
US1000366A
Cited
US1014058A
Cited
US1217225A
Cited
US1549440A
Cited
US1525781A
Cited
US1956829A
Cited
US1958342A
Cited
US1937483A
Cited
US1948239A
Cited
US1916907A
Cited
US2044098A
Cited
US2021521A
Cited
US2230612A
Cited
US2198867A
Cited
US2158413A
Cited
US2234037A
Cited
US2186067A
Cited
US2207770A
Cited
US2335627A
Cited
US2303254A
Cited
US2362114A
Cited
US2456391A
Cited
US2502830A
Cited
US2560808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |