US3467647A
Expired / Lapsed
US
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Cationic and anionic substituted polysaccharides and process for preparing same
Assignee: Scholtens Chemische Fabrieken NV
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Filing: 1967-03-08
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Granted: 1969-09-16
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Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 Harm Benninga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:14
CPC Classifications
D; D01; D01F; D01F9/00; C; C08; C08B; C08B31/00; C08B31/02; C08B31/06; C08B31/16; C08B37/00; C08B37/006; C08B37/0087; C08B37/0093; C08B37/0096; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2812324A
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US2894944A
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US3046272A
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US3098869A
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US3300473A
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US3247048A
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US3376282A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |