US2905448A
Expired / Lapsed
US
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Apparatus for preparing colloidal dispersions
Assignee: Pure Oil Co
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Filing: 1954-10-06
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Granted: 1959-09-22
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Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Martinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/27; B01F27/272; B01F25/00; B01F25/20; B01F25/23; B01F27/2723; B01F27/2724; B01F2025/91; Y; Y10; Y10S; Y10S516/00; Y10S516/924; Y10S516/928; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/922; Y10S585/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |