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US2567556A
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Method and apparatus for regulating the operation of an open-fire tunnel kiln
Assignee: SWINDELL DRESSLER CORP
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Filing: 1949-06-02
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Granted: 1951-09-11
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Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Dressler Philip D Huc
- 👤 Hopkins Carl Crandall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:42
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/3005; F27B9/40; F27B9/3011; F27B2009/3022; F27B9/14; F27B9/20; F27B9/26; F27B9/262; F27M; F27M2001/00; F27M2001/15; F27M2001/1504
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |