US2847929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper for registers or the like
Assignee: AIR CONTROL PRODUCTS Inc
•
Filing: 1955-12-06
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Granted: 1958-08-19
•
Expires: 1975-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert L Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE30158C
Cited
US345689A
Cited
US668400A
Cited
US1659880A
Cited
US1872599A
Cited
US1931263A
Cited
US2400044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |