US2623448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for adjustably supplying air to auditoriums and the like
Assignee: Individual
•
Filing: 1949-08-09
•
Granted: 1952-12-30
•
Expires: 1969-08-09
Abstract
No abstract record available.
Inventors
- 👤 Runefelt Victor Elis Algernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:05
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/0604
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US374424A
Cited
US760182A
Cited
US1370832A
Cited
US2065192A
Cited
US2022959A
Cited
US2151138A
Cited
GB545005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |