US3454428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cleaning chips and the like
Assignee: Dow Chemical Co
•
Filing: 1964-08-03
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Granted: 1969-07-08
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Expires: 1984-08-03
Abstract
No abstract record available.
Inventors
- 👤 George T Hittel
- 👤 John Karpovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
B; B65; B65G; B65G49/00; B65G49/02; B65G49/04; B65G49/0409; B65G49/0436; B65G49/0495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580723A
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US1624982A
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US2578040A
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US2647846A
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US3222221A
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US3092515A
Cited
US3024138A
Cited
US3119721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |