Patent US2817334A successfully refreshed from Google Patents.
US2817334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air demand equipment
Assignee: Individual
•
Filing: 1954-11-24
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Granted: 1957-12-24
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Expires: 1974-11-24
Abstract
No abstract record available.
Inventors
- 👤 Sajeck George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:22
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/02; A62B7/04; A62B9/00; A62B9/02; A62B9/022; B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2209; Y; Y10; Y10S; Y10S137/00; Y10S137/908; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/88046
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |