Patent US1861021A successfully refreshed from Google Patents.
US2924439A
Expired / Lapsed
US
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Apparatus for making dispersions
Assignee: EIDP Inc
•
Filing: 1957-05-27
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Granted: 1960-02-09
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Hubert W Dutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:09
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/93; B01F35/00; B01F35/50; B01F35/53; B01F35/531; B01F35/5312; B01F27/05; B01F27/11; B01F27/19; B01F27/191
Claims Analysis
Total Claims: 0
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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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |