US3425913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing paraffin from crude oil
Assignee: ConocoPhillips Co
•
Filing: 1966-10-12
•
Granted: 1969-02-04
•
Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 Harold H Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:38
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2370453A
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US2354246A
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US2361503A
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US2420418A
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US2677394A
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US2717049A
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US2914456A
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US3159563A
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US3192125A
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CH456680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |