Patent US3346563A successfully refreshed from Google Patents.
US3346563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of quaternary ammonium starch ethers
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1964-08-07
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Granted: 1967-10-10
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Expires: 1984-08-07
Abstract
No abstract record available.
Inventors
- 👤 Paul R Shildneck
- 👤 Robert J Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:11
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD OF PREPARING A CATIONIC STARCH ETHER THAT COMPRISES REACTING STARCH AND A QUATERNARY HALOHYDRIN SALT WITH AN ALKALINE CATALYST, SAID HALOHYDRIN SALT BEING OBTAINED BY REACTING HYPOHALOUS ACID WITH AN ALLYL QUATERNARY HALIDE SALT OF A TERTIARY AMINE, SAID ALLYL SALT BEING ESSENTIALLY FREE FROM EXCESS ALLYL HALIDE AND ALLYL ALCOHOL, SAID TERTIARY AMINE BEING SELECTED FROM THE GROUP CONSISTING OF (1) TERTIARY AMINES WHOSE THREE NITROGEN SUBSTITUENTS ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL OF UP TO 12 CARBON ATOMS, CYCLOHEXYL, PHENYL AND BENZYL SUCH THAT, WHEN THE THREE SUBSTITUENTS ARE THE SAME, NONE HAS MORE THAN 6 CARBON ATOMS AND, WHEN ANY SUBSTITUENT HAS MORE THAN 6 CARBON ATOMS, THE OTHER TWO ARE ALKYL OF UP TO 2 CARBON ATOMS, AND (2) HETEROCYCLIC TERTIARY AMINES WHEREIN THE THIRD SUBSTITUENT ON THE NITROGEN OF THE RING IS LOWER ALKYL, THE HETEROCYCLIC RING BEING SELECTED FROM THE GROUP CONSISTING OF MORPHOLINYL, PYRROLIDYL AND PIPERIDYL, EACH HAVING UP TO ONE ALKYL RING SUBSTITUENT OF NOT MORE THAN TWO CARBON ATOMS.
Claim 2
Independent Claim
172 words
A METHOD OF PREPARING A CATIONIC STARCH ETHER THAT COMPRISES REACTING STARCH AND A QUATERNARY HALOHYDRIN SALT WITH AN ALKALINE CATALYST, SAID HALOHYDRIN SALT BEING OBTAINED BY REACTING HYPOHALOUS ACID WITH AN ALLYL QUATERNARY HALIDE SALT OF A TERTIARY AMINE, SAID ALLYL SALT BEING ESSENTIALLY FREE FROM EXCESS ALLYL HALIDE AND ALLYL ALCOHOL, SAID TERTIARY AMINE BEING SELECTED FROM THE GROUP CONSISTING OF (1) TERTIARY AMINES WHOSE THREE NITROGEN SUBSTITUENTS ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL OF UP TO 12 CARBON ATOMS, CYCLOHEXYL, PHENYL AND BENZYL SUCH THAT, WHEN THE THREE SUBSTITUENTS ARE THE SAME, NONE HAS MORE THAN 6 CARBON ATOMS AND, WHEN ANY SUBSTITUENT HAS MORE THAN 6 CARBON ATOMS, THE OTHER TWO ARE ALKYL OF UP TO 2 CARBON ATOMS, AND (2) HETEROCYCLIC TERTIARY AMINES WHEREIN THE THIRD SUBSTITUENT ON THE NITROGEN OF THE RING IS LOWER ALKYL, THE HETEROCYCLIC RING BEING SELECTED FROM THE GROUP CONSISTING OF MORPHOLINYL, PYRROLIDYL AND PIPERIDYL, EACH HAVING UP TO ONE ALKYL RING SUBSTITUENT OF NOT MORE THAN TWO CARBON ATOMS.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |