Patent US2943632A successfully refreshed from Google Patents.
US2943632A
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US
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Apparatus for washing porous materials
Assignee: Individual
•
Filing: 1957-10-08
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Granted: 1960-07-05
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Expires: 1977-10-08
Abstract
No abstract record available.
Inventors
- 👤 Bush Ian Elcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:39
CPC Classifications
B; B01; B01D; B01D41/00; B01D41/04; D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/66; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44949; Y10T24/44957
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US588030A
Cited
US1441816A
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US1405840A
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US1503894A
Cited
US1858894A
Cited
US2434607A
Cited
US2659146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |