US3062810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch ether derivatives and process for preparing same
Assignee: Penick and Ford Ltd Inc
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Filing: 1956-10-22
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Granted: 1962-11-06
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Erling T Hjermstad
- 👤 Carl C Kesler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:16
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A METHOD OF PRODUCING PARTIALLY ETHERIFIED, FILTERABLE GRANULE STARCH, THE STEP OF REACTING UNSWOLLEN, GRANULE STARCH WITH A MONOCHLORINE SUBSTITUTED ORGANIC ETHERIFYING AGENT REACTING MONOFUNCTIONALLY WITH STARCH AND IN WHICH THE CHLORINE ATOM IS ATTACHED TO A SINGLE-BONDED CARBON ATOM IN AN ALIPHATIC CHAIN, SAID ETHERIFYING AGENT BEING FREE OF HYDROXYL AND EPOXY GROUPS, SAID REACTION BEING CARRIED OUT IN A WATER SOLUTION OF A TRIBASIC ALKALI METAL PHOSPHATE., AT LEAST 0.15 MOLE OF SAID TRIBASIC ALKALI METAL PHOSPHATE PER C5H10O5 MOLE OF SAID STARCH BEING EMPLOYED FOR SAID REACTION.
Claim 2
Dependent Claim
91 words
IN A METHOD OF PRODUCING PARTIALLY ETHERIFIED, FILTERABLE GRANULE STARCH, THE STEP OF REACTING UNSWOLLEN, GRANULE STARCH WITH A MONOCHLORINE SUBSTITUTED ORGANIC ETHERIFYING AGENT REACTING MONOFUNCTIONALLY WITH STARCH AND IN WHICH THE CHLORINE ATOM IS ATTACHED TO A SINGLE-BONDED CARBON ATOM IN AN ALIPHATIC CHAIN, SAID ETHERIFYING AGENT BEING FREE OF HYDROXYL AND EPOXY GROUPS, SAID REACTION BEING CARRIED OUT IN A WATER SOLUTION OF A TRIBASIC ALKALI METAL PHOSPHATE., AT LEAST 0.15 MOLE OF SAID TRIBASIC ALKALI METAL PHOSPHATE PER C5H10O5 MOLE OF SAID STARCH BEING EMPLOYED FOR SAID REACTION.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |