Patent US3823100A successfully refreshed from Google Patents.
US3823100A
Expired / Lapsed
US
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Polysaccharide based flocculants
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1973-03-05
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Granted: 1974-07-09
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Expires: 1993-03-05
Abstract
Abstract A SUBSTITUTED POLYSACCHARIDE IS DESCRIBED WHICH IS WATER SOUBLE AND WHICH IS OF USE AS, FOR EXAMPLE, A FLUCCULANT. THE SUBSTITUENT GROUPS ARE N(AMINO METHYL)PROPIONAMIDE GROUPS AND MAY BE MONOMERIC OR POLYMERIC.
Inventors
- 👤 E Rothwell
- 👤 G Smalley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:44
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/5263; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |