Patent US2886121A successfully refreshed from Google Patents.
Patent US2123751A successfully refreshed from Google Patents.
US2123751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: ADJUSTABLE LOUVER Corp
•
Filing: 1936-07-09
•
Granted: 1938-07-12
•
Expires: 1956-07-09
Abstract
No abstract record available.
Inventors
- 👤 Sigal Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:05
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1941-07-11 | 1942-01-10 | 1942-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-07-11 | 1946-01-10 | 1946-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-07-11 | 1950-01-10 | 1950-07-12 | $7700.00 | Window Closed / Lapsed |