US2610565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling air pressure in buildings
Assignee: Individual
•
Filing: 1946-12-14
•
Granted: 1952-09-16
•
Expires: 1966-12-14
Abstract
No abstract record available.
Inventors
- 👤 William W Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/0001; F24F2011/0002; F24F2011/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1263830A
Cited
US1397739A
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US1600522A
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US1778560A
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US1947223A
Cited
US1985050A
Cited
US2282210A
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US2355412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |