US2884231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic blender
Assignee: Halliburton Oil Well Cementing Co
•
Filing: 1955-11-18
•
Granted: 1959-04-28
•
Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Pyle
- 👤 Samuel S Northington
- 👤 George V Copland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/40; B01F33/405; B01F33/4051; B01F33/40511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160848A
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US1513975A
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US2487961A
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US2582802A
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US2697685A
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US2718471A
Cited
US2723838A
Cited
US2716509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |