US3051691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic, nitrogenated, hydrophilic colloids
Assignee: Hubinger Co
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Filing: 1959-01-15
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Granted: 1962-08-28
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Expires: 1979-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lee H Elizer
- 👤 Glen C Glasscock
- 👤 John M Seitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/22; B01J13/00; B01J13/0004; B01J13/0034; C; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
A CATIONIC NITROGENATED POLYVINYL ALCOHOL OBTAINED BY REACTING POLYVINYL ALCOHOL COLLOIDALLY DISPERSED IN AN AQUEOUS SOLUTION WITH A COMPOUND FROM THE GROUP CONSISTING OF CYANAMIDE, ALKALI METAL SALTS OF CYANAMIDE AND ALKALINE EARTH METAL SALTS OF CYANAMIDE AT A PH OF AT LEAST 1 UNTIL A CATIONIC NITROGENATED POLYVINYL ALCOHOL IS FORMED.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |