Patent US2961046A successfully refreshed from Google Patents.
US2961046A
Expired / Lapsed
US
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Feeding and counting system for injecting balls into a flow stream
Assignee: Halliburton Oil Well Cementing Co
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Filing: 1958-05-26
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Granted: 1960-11-22
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert E Moeller
- 👤 Joel M Stogner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189508950A
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US1211738A
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US1999430A
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US2011133A
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US2306747A
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US2440482A
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US2634098A
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US2551477A
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US2698582A
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US2729206A
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US2790500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |