Patent US2957189A successfully refreshed from Google Patents.
US2957189A
Expired / Lapsed
US
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Pipe cleaning pig
Assignee: Osborn Manufacturing Corp
•
Filing: 1958-06-12
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Granted: 1960-10-25
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Expires: 1978-06-12
Abstract
No abstract record available.
Inventors
- 👤 Brooks E Nelson
- 👤 Gray Willard Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:42
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US152766A
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US582953A
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US728085A
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US1040088A
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US1074875A
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US1097418A
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US1631562A
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US1554760A
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US2392144A
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |