US1783005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating apparatus
Assignee: Individual
•
Filing: 1929-05-13
•
Granted: 1930-11-25
•
Expires: 1949-05-13
Abstract
No abstract record available.
Inventors
- 👤 Stewart Alexander William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:58
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/065; B; B64; B64D; B64D13/00; B64D2013/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-11-24 | 1934-05-26 | 1934-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-11-24 | 1938-05-26 | 1938-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-11-24 | 1942-05-26 | 1942-11-25 | $7700.00 | Window Closed / Lapsed |