Patent US3741782A successfully refreshed from Google Patents.
US3741782A
Expired / Lapsed
US
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Stabilized zirconium salts
Assignee: British Aluminum Co Ltd
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Filing: 1971-05-13
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Granted: 1973-06-26
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Expires: 1991-05-13
Abstract
Abstract THIS INVENTION TO THE STABILISING OF ZIRCONIUM SALTS SUCH AS ARE USED TO CONVERT AQUEOUS SOLUTIONSOF NATURAL OR SYNTHETIC POLYMERS CAPABLE OF FORMING HYDROPHILIC COLLOIDS INTO INSOLUBLE FILMS. MORE PARTICULARLY, THE INVENTIONS IS CONCERNED WITH THE STABILISING OF A SOLUTION OF AN ALKALI METAL ZIRCONYLL CARBONATE WITH A COMPOUNDS CONTAINING A DIOL GROUP AND OF THE GENERAL FORMULA R1--CHOH--CHOH--R2. THE INVENTION EXTENDS TO SOLUTIONS SO STABILISED AND TO THE USE OF THE STABILISED SOLUTIONS IN THE MANUFACTURE OF PAPER, PAPER BOARD AND THE LIKE CELLULOSIC WEB MATERIALS.
Inventors
- 👤 D Stewart
- 👤 Alpine I Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:14
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/006; Y; Y10; Y10S; Y10S516/00; Y10S516/01
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |