US2449738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil emulsion treater
Assignee: Parkersburg Rig and Reel Co
•
Filing: 1944-04-14
•
Granted: 1948-09-21
•
Expires: 1964-04-14
Abstract
No abstract record available.
Inventors
- 👤 George E Dake
- 👤 Joe A Lyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:46
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211; B01D17/04; B01D17/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2016642A
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US2181685A
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US2326384A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |