Patent US3637861A successfully refreshed from Google Patents.
US3637861A
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US
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Method for producing novel stabilizers for aqueous formaldehyde solutions and product
Assignee: Dyno Industrier AS
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Filing: 1970-03-11
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Granted: 1972-01-25
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Expires: 1990-03-11
Abstract
Abstract NOVEL STABILIZERS FOR CONCENTRATED AQUEOUS FORMALDEHYDE SOLUTIONS ARE PRODUCED BY REACTING AN ORGANIC HALOGENATED SILANE AND A LONG CHAIN CARBOHYDRATE IN PYRIDINE. THESE STABILIZERS ARE EFFECTIVE OVER THE TEMPERATURE RANGE FROM ABOUT 20*C. TO ABOUT 90*C. THE STABILIZERS OF THIS INVENTION DO NOT EXHIBIT ANY APPRECIABLE FOAMING AND PREVENT POLYMER FORMATION AT ROOM TEMPERATURE.
Inventors
- 👤 Frederic J Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:00
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/86; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |