US3232867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of anionic surfactants from liquids
Assignee: Diamond Shamrock Corp
•
Filing: 1963-08-19
•
Granted: 1966-02-01
•
Expires: 1983-08-19
Abstract
No abstract record available.
Inventors
- 👤 Irving M Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/04; B01J41/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THE METHOD FOR REMOVING ANIONIC SURFACTANTS FROM WATER WHICH COMPRISES CONTACTING WATER CONTAINING ANIONIC SURFACTANTS WITH A WEAK-BASE ANION-EXCHANGE RESIN IN THE ACID-SALT FORM.
Claim 2
Independent Claim
24 words
THE METHOD FOR REMOVING ANIONIC SURFACTANTS FROM WATER WHICH COMPRISES CONTACTING WATER CONTAINING ANIONIC SURFACTANTS WITH A WEAK-BASE ANION-EXCHANGE RESIN IN THE ACID-SALT FORM.
References Cited (Backward Citations)
US3030411A
Cited
US3123553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |