Patent US3619844A successfully refreshed from Google Patents.
US3619844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc type pipeline scraper and batch separator
Assignee: Oil States Rubber Co
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Filing: 1970-08-03
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Granted: 1971-11-16
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Expires: 1990-08-03
Abstract
Abstract A PIPELINE SCRAPER AND BATCH SEPARATOR EMPLOYMENT MULTIPE SIMILAR MOLDED PLASTIC SCRAPER DISCS HAVING INTERLOCKING PATTERNS ON THEIR FACES HODLDING THE DISCS IN PREDETERMINED MUTUAK CIRCUMFERNIAL ORIENTATION WHEN THE PATTERNS ARE MATED AND THE DISCS ARE CLAMPED TOGETHER ON A MANDREL, THE DISCS HAVING OUTWADLY EXTENDING SCRAPER SEGMENTS ALTERNATING WITH NOTCHED-OUT SEGMENTS, AND THE INTERLOCKING PATTERNS HOLDING THE SCRAPER SEGEMENTS OF ONE DISC OVER THE NOTCHED SEGEMENTS OF AN ADJACENT DISC SO AS TO FORM A COMPOSITE SUBSTANTIALLY SEALING STRUCTURE USEFUL EITHER AS A SCRAPER OR AS A BATCH SEPARATOR
Inventors
- 👤 Wilbur W Collins
- 👤 Jack L Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:07
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |