US1672862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firing arrangement for muffle furnaces
Assignee: Surface Combustion Corp
•
Filing: 1927-09-26
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Granted: 1928-06-05
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Expires: 1947-09-26
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:15
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/02; F27B9/021; F27B9/06; F27B9/08; F27B9/082; F27B9/14; F27B9/20; F27B9/24; F27B9/2407
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) | 1931-06-05 | 1931-12-05 | 1932-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-05 | 1935-12-05 | 1936-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-05 | 1939-12-05 | 1940-06-05 | $7700.00 | Window Closed / Lapsed |