US2884230A
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/40; B01F33/405; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 0
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DE922155C
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US2723838A
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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) | 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 |