US1964845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: AT&T Inc
•
Filing: 1933-09-14
•
Granted: 1934-07-03
•
Expires: 1953-09-14
Abstract
No abstract record available.
Inventors
- 👤 Dietze Eginhard
- 👤 Jr Walter Deming Goodale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:38
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F7/013; F16; F16L; F16L55/00; F16L55/02; F24F13/00; F24F13/24; G; G10; G10K; G10K11/00; G10K11/02; G10K11/04
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) | 1937-07-02 | 1938-01-01 | 1938-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-02 | 1942-01-01 | 1942-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-02 | 1946-01-01 | 1946-07-03 | $7700.00 | Window Closed / Lapsed |