US3393944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for pneumatically injecting solid particles into a high pressure zone
Assignee: Petrocarb Inc
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Filing: 1966-10-25
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Granted: 1968-07-23
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Expires: 1986-10-25
Abstract
No abstract record available.
Inventors
- 👤 Reintjes Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:32
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035; B01J3/00; B01J3/02; C; C10; C10B; C10B57/00; C10B57/18; C10J; C10J3/00; C10J3/46; C10J3/466; C10J3/48; C10J3/50; C10J3/506; F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/1035; C10J2200/00; C10J2200/15; C10J2200/156
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2667280A
Cited
US3294030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |