US1569845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating apparatus
Assignee: General Electric Co
•
Filing: 1924-05-29
•
Granted: 1926-01-12
•
Expires: 1944-05-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; F04D29/526
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) | 1929-01-11 | 1929-07-13 | 1930-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-11 | 1933-07-13 | 1934-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-11 | 1937-07-13 | 1938-01-12 | $7700.00 | Window Closed / Lapsed |