Patent US3533837A successfully refreshed from Google Patents.
US3533837A
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US
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Apparatus for the continuous extraction of water soluble materials from solids by diffusion
Assignee: SUCHEM Inc
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Filing: 1967-10-09
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Granted: 1970-10-13
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Philippe P Strich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:50
CPC Classifications
C; C13; C13B; C13B10/00; C13B10/08; C13B10/10; C13B10/107; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0238
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1150263A
Cited
US2840459A
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US3021201A
Cited
US3113954A
Cited
US3131202A
Cited
US3248263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |