Patent US2810143A successfully refreshed from Google Patents.
US2810143A
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Paraffin scraper
Assignee: Phillips Petroleum Co
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Filing: 1954-06-24
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Granted: 1957-10-22
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Orvel B Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:19
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1280443A
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US2114236A
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US2640213A
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US2690808A
Cited
US2685685A
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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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |