US2617595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace damper control
Assignee: W M CHACE CO
•
Filing: 1951-01-12
•
Granted: 1952-11-11
•
Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence F Alban
- 👤 Raymond H Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:31
CPC Classifications
F; F23; F23N; F23N3/00; F23N3/04; F23N3/047; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US260651A
Cited
US1603593A
Cited
US1744969A
Cited
US1814812A
Cited
DE573672C
Cited
US2242183A
Cited
US2372307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |