US1475731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door and door-operating mechanism for furnaces and the like
Assignee: WELLMAN SEAVER MORGAN CO
•
Filing: 1920-03-06
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Granted: 1923-11-27
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Expires: 1940-03-06
Abstract
No abstract record available.
Inventors
- 👤 Windett Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:05
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0218; F16K3/16; F16K3/18
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) | 1926-11-26 | 1927-05-28 | 1927-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-26 | 1931-05-28 | 1931-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-26 | 1935-05-28 | 1935-11-27 | $7700.00 | Window Closed / Lapsed |