US2710573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air handling apparatus
Assignee: TRADE WIND MOTORFANS Inc
•
Filing: 1951-04-30
•
Granted: 1955-06-14
•
Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 William M Marker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:44
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/20; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/082; F04D25/16; F04D25/166; F04D29/00; F04D29/58; F04D29/5806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2135785A
Cited
US2251553A
Cited
US2349668A
Cited
US2337325A
Cited
US2456391A
Cited
US2583555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |