US2434090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator for enclosed spaces
Assignee: Individual
•
Filing: 1944-01-21
•
Granted: 1948-01-06
•
Expires: 1964-01-21
Abstract
No abstract record available.
Inventors
- 👤 Alton Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
A; A01; A01K; A01K47/00; A01K47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US505345A
Cited
US589603A
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US1268973A
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US1992377A
Cited
US2136648A
Cited
US2107809A
Cited
US2232343A
Cited
US2346287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |