US3495606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper valve for ventilating ducts
Assignee: Sterling Radiator Co Inc
•
Filing: 1965-08-05
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Granted: 1970-02-17
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Expires: 1985-08-05
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:37
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/12; A62C2/14; A62C2/16; F; F16; F16K; F16K17/00; F16K17/006; F16K17/36; F16K17/38; F16K17/383; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/35; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |