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Patent US2920635A successfully refreshed from Google Patents.
US2920635A
Expired / Lapsed
US
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Slurry removal system
Assignee: US Borax Inc
•
Filing: 1957-06-05
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Granted: 1960-01-12
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Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Wilson William Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:40
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/30; B01; B01J; B01J3/00; B01J3/02; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0419; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/8593; Y10T137/85954; Y10T137/87571; Y10T137/87587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1000689A
Cited
US1160848A
Cited
US1833390A
Cited
US2265225A
Cited
US2337260A
Cited
US2631926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |