US3257380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving gums and product obtainable thereby
Assignee: Kelco Co
•
Filing: 1962-11-26
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Granted: 1966-06-21
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schweiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:53
CPC Classifications
C; C08; C08B; C08B37/00; A; A23; A23L; A23L29/00; A23L29/20; A23L29/206; C08B11/00; C08B11/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
THE PROCESS OF IMPROVING THE WATER DISPERSIBILITY OF A POLYSACCHARIDE GUM IN TH EFORM OF GRANULES OF PARTICLE SIZE BETWEEN ABOUT 10 MESH AND ABOUT 200 MESH WHICH COMPRISES: PLACING SAID GRANULES IN A SOLUTION OF PERIODIC ACID IN A LIQUID CHOSEN FROM THE GROUP WHICH CONSISTS OF METHANOL, ETHANOL, PROPANOL, ISOPROPANOL, ACETONE, METHYL ETHYL KETONE AND IOXANE BUT PREFERABLY IN MIXTURES THEREOF WITH WATER; REMOVING SAID GRANULES FROM SAID LIQUID AFTER A SUFFICIENT TIME HAS ELAPSED FOR SURFACE REACTION OF SAID PERIODIC ACID WITH SAID GUM; AND THEREAFTER TREATING SAID GRANULES WITH SULFITE ION SO AS TO REMOVE RESIDUAL PERIODIC ACID FROM SAID GRANULES.
References Cited (Backward Citations)
US2879268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |