US2666975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace lining, method of lining furnaces, and the like
Assignee: Individual
•
Filing: 1949-04-01
•
Granted: 1954-01-26
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
- 👤 Govan Jack Farnsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/1678; F27D1/1684; C; C04; C04B; C04B35/00; C04B35/01; F27D1/1636; F27D2001/1605; F27D2001/161
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US543741A
Cited
US1308481A
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US2407725A
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US1125741A
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US1237520A
Cited
US2124865A
Cited
US2336366A
Cited
GB574558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |