Patent US3401925A successfully refreshed from Google Patents.
US3401925A
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US
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Apparatus for separating materials
Assignee: College Res Corp
•
Filing: 1965-09-29
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Granted: 1968-09-17
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Expires: 1985-09-29
Abstract
No abstract record available.
Inventors
- 👤 Evans Marvin
- 👤 David H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:44
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/14; C; C22; C22B; C22B7/00; C22B7/001; C22B7/004; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1618338A
Cited
US2701067A
Cited
US2852418A
Cited
US3031807A
Cited
US3193273A
Cited
US3278001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |