US2703519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Farr Co
•
Filing: 1951-03-05
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Granted: 1955-03-08
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Expires: 1971-03-05
Abstract
No abstract record available.
Inventors
- 👤 Richard B Esselman
- 👤 Allen W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B60; B60K; B60K13/00; B60K13/02; B61; B61C; B61C17/00; B61C17/04; F24F13/082; Y; Y10; Y10S; Y10S55/00; Y10S55/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748669A
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US680657A
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US1098329A
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US1673906A
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US1733770A
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US1865677A
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US2091621A
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US2123838A
Cited
US2144528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |