Patent US2897251A successfully refreshed from Google Patents.
US2897251A
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US
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Electric treater
Assignee: Baker Petrolite LLC
•
Filing: 1953-06-05
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Granted: 1959-07-28
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Logan C Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1528296A
Cited
US1891645A
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US1887010A
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US1978793A
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US2099063A
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US2393328A
Cited
US2527690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |