US2812312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of ion exchange resins
Assignee: EIDP Inc
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Filing: 1957-01-18
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Granted: 1957-11-05
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 William K Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS OF REGENERATING ION EXCHANGE RESINS WHICH HAVE BEEN USED TO REMOVE HIGHER ALKYL SULFATES FROM AN AQUEOUS SOLUTION AND TO WHICH THE SAID ALKYL SULFATES ARE FIRMLY ATTACHED WHICH COMPRISES REGENERATING THE RESIN BY CONTACTING THE DEGENERATED ION EXCHANGE RESIN WITH A DILUTE SOLUTION OF A STRONG MINERAL ACID, AND REMOVING THE RELEASED ALKYL ALCOHOL FROM THE RESIN.
Claim 2
Dependent Claim
60 words
THE PROCESS OF REGENERATING ION EXCHANGE RESINS WHICH HAVE BEEN USED TO REMOVE HIGHER ALKYL SULFATES FROM AN AQUEOUS SOLUTION AND TO WHICH THE SAID ALKYL SULFATES ARE FIRMLY ATTACHED WHICH COMPRISES REGENERATING THE RESIN BY CONTACTING THE DEGENERATED ION EXCHANGE RESIN WITH A DILUTE SOLUTION OF A STRONG MINERAL ACID, AND REMOVING THE RELEASED ALKYL ALCOHOL FROM THE RESIN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |