US926174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper and flue-ventilator.
Assignee: Individual
•
Filing: 1909-03-08
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Granted: 1909-06-29
•
Expires: 1929-03-08
Abstract
No abstract record available.
Inventors
- 👤 Alexander R Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2261
Claims Analysis
Total Claims: 0
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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) | 1912-06-28 | 1912-12-28 | 1913-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-06-28 | 1916-12-28 | 1917-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-06-28 | 1920-12-28 | 1921-06-29 | $7700.00 | Window Closed / Lapsed |