US2354292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating system for positive air control in buildings
Assignee: JAMES Manufacturing CO
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Filing: 1941-06-23
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Granted: 1944-07-25
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Expires: 1961-06-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:15
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06
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) | 1947-07-25 | 1948-01-24 | 1948-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-25 | 1952-01-24 | 1952-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-25 | 1956-01-24 | 1956-07-25 | $7700.00 | Window Closed / Lapsed |