US3248263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction process
Assignee: AMERICAN FACTORS ASS Ltd
•
Filing: 1962-11-14
•
Granted: 1966-04-26
•
Expires: 1982-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harold F Silver
- 👤 Clarence R Steele
- 👤 Frank B Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C13; C13B; C13B5/00; C13B5/04; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0238; B02; B02C; B02C13/00; B02C13/02; B02C13/04; B02C13/26; B02C13/282; C13B10/00; C13B10/08; C13B10/10; B01D2011/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS OF CONTINUOUSLY EXTRACTING A SOLUBLE SUBSTANCE FROM SUBDIVIDED SOLID MATERIAL WHICH COMPRISES ESTABLISHING AN ELONGATED SUBSTANTIALLY HORIZONTAL CONTINUOUS MASS OF SAID MATERIAL IN A TROUGH-LIKE UNPARTITIONED RECEPTACLE HAVING A DRAINING BOTTOM AND UPSTANDING SIDE WALLS OF SUBSTANTIAL HEIGHT, MOVING SAID MASS AND RECEPTABLE AS A UNIT WHILE PROVIDING CLOSE LATERAL SUPPORT FOR SAID MASS BY SAID SIDE WALLS WITHOUT RELATIVE MOVEMENT BETWEEN SAID MASS AND SIDE WALLS, MAINTAINING SAID MASS BY CONTINUOUSLY ADDING FRESH MATERIAL TO ONE END THEREOF AND CONTINUOUSLY REMOVING SPENT MATERIAL FROM THE OTHER END THEREOF, APPLYING SOLVENT TO THE TOP OF A SELECTED ZONE OF SAID MASS LOCATED ADJACENT THE END THEREOF WHERE THE REMOVAL JOF SPENT MATERIAL IS EFFECTED, CAUS-
Claim 2
Dependent Claim
117 words
THE PROCESS OF CONTINUOUSLY EXTRACTING A SOLUBLE SUBSTANCE FROM SUBDIVIDED SOLID MATERIAL WHICH COMPRISES ESTABLISHING AN ELONGATED SUBSTANTIALLY HORIZONTAL CONTINUOUS MASS OF SAID MATERIAL IN A TROUGH-LIKE UNPARTITIONED RECEPTACLE HAVING A DRAINING BOTTOM AND UPSTANDING SIDE WALLS OF SUBSTANTIAL HEIGHT, MOVING SAID MASS AND RECEPTABLE AS A UNIT WHILE PROVIDING CLOSE LATERAL SUPPORT FOR SAID MASS BY SAID SIDE WALLS WITHOUT RELATIVE MOVEMENT BETWEEN SAID MASS AND SIDE WALLS, MAINTAINING SAID MASS BY CONTINUOUSLY ADDING FRESH MATERIAL TO ONE END THEREOF AND CONTINUOUSLY REMOVING SPENT MATERIAL FROM THE OTHER END THEREOF, APPLYING SOLVENT TO THE TOP OF A SELECTED ZONE OF SAID MASS LOCATED ADJACENT THE END THEREOF WHERE THE REMOVAL JOF SPENT MATERIAL IS EFFECTED, CAUS-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |