US2550807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel kiln
Assignee: HANLEY Co Inc
•
Filing: 1947-02-19
•
Granted: 1951-05-01
•
Expires: 1967-02-19
Abstract
No abstract record available.
Inventors
- 👤 Jr William L Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:55
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/3005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1768486A
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US1701223A
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US1862548A
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US1698700A
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US1764460A
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US2003451A
Cited
US2307322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |