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US2850329A
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Pneumatically operated system
Assignee: Halliburton Oil Well Cementing Co
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Filing: 1956-10-01
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Granted: 1958-09-02
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Pyle
- 👤 Samuel S Northington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:01
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/10; B65G53/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1422105A
Cited
US1364532A
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US1749817A
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US2594525A
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US2598002A
Cited
US2673764A
Cited
FR1074419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |