US3332933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diacyl n-alkyl ammonium alginates and their preparation
Assignee: Kelco Co
•
Filing: 1964-02-21
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Granted: 1967-07-25
•
Expires: 1984-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schweiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A SALT OF A LOWER DIACYL ALGINIC ACID IN WHICH THE CATION IS SUBSTITUTED AMMONIUM (NH4+) IN WHICH AT LEAST ONE OF THE HYDROGEN ATOMS OF SAID AMMONIUM HAVE BEEN REPLACED BY AT LEAST ONE RADICAL CHOSEN FROM THE GROUP CONSISTING OF ALKYL HAVING FROM TOW TO EIGHTEEN CARBON ATOMS INCLUSIVE; CYCLOHEXYL; CYCLOHEXANOL; PHENYL; AND BENZYL.
Claim 2
Dependent Claim
56 words
A SALT OF A LOWER DIACYL ALGINIC ACID IN WHICH THE CATION IS SUBSTITUTED AMMONIUM (NH4+) IN WHICH AT LEAST ONE OF THE HYDROGEN ATOMS OF SAID AMMONIUM HAVE BEEN REPLACED BY AT LEAST ONE RADICAL CHOSEN FROM THE GROUP CONSISTING OF ALKYL HAVING FROM TOW TO EIGHTEEN CARBON ATOMS INCLUSIVE; CYCLOHEXYL; CYCLOHEXANOL; PHENYL; AND BENZYL.
References Cited (Backward Citations)
US2158487A
Cited
US2589226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |