Patent US2959271A successfully refreshed from Google Patents.
Patent US3255172A successfully refreshed from Google Patents.
US3255172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water softener from keratinaceous materials modified with alkali hydroxides and water
Assignee: JBS USA LLC
•
Filing: 1962-01-29
•
Granted: 1966-06-07
•
Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 John J Krajewski
- 👤 Harry T Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:49
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A PROCESS FOR THE PRODUCTION OF AN ION EXCHANGE RESIN WHICH COMPRISES; MIXING A KERATINACEOUS SUBSTANCE WITH ABOUT 1/2% TO ABOUT 2 1/2% BY WEIGHT, BASED ON THE AMOUNT OF THE KERATINACEOUS SUBSTANCE, OF A BASE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL OXIDES AND HYDROXIDES IN THE PRESENCE OF A MINOR AMOUNT OF WATER, SAID MINOR AMOUNT BEING JUST SUFFICIENT TO WET THE MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |