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US2881161A
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Amides of alginic acid
Assignee: Henkel AG and Co KGaA
•
Filing: 1955-03-25
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Granted: 1959-04-07
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Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Kohler Rudolf
- 👤 Dierichs Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:58
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN AMIDE OF ALGINIC ACID CONTAINING A CARBOXYLIC ACID AMIDE GROUP HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
15 words
AN AMIDE OF ALGINIC ACID CONTAINING A CARBOXYLIC ACID AMIDE GROUP HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2494912A
Cited
US2463824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |