Patent US3532985A successfully refreshed from Google Patents.
US2801992A
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Suspension stabilizer of magnesium hydroxide and excess alkali
Assignee: Distillers Co Yeast Ltd
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Filing: 1954-08-04
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Granted: 1957-08-06
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Hutchinson Henry Malcolm
- 👤 Stevens Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:33
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR THE SUSPENSION POLYMERIZATION OF A POLYMERIZABLE ETHYLENIC MONOMER WHICH COMPRISES POLYMERIZING THE MONOMER IN AN AQUEOUS SUSPENSION CONTAINING EXCESS ALKALI IN THE PRESENCE OF FINELY DIVIDED MAGNESIUM HYDROXIDE AS SOLE SUSPENSION STABILIZER, THE EXCESS ALKALI BEING 1% TO 10% MOLAR EXCESS RELATIVE TO THE MOLES OF MAGNESIUM HYDROXIDE PRESENT, WHEREBY RESIDUAL STABILIZER PARTICLES MAY BE REMOVED FROM THE FINISHED POLYMER SUSPENSION BY WASHING WITH AQUEOUS ACID.
Claim 2
Dependent Claim
69 words
A PROCESS FOR THE SUSPENSION POLYMERIZATION OF A POLYMERIZABLE ETHYLENIC MONOMER WHICH COMPRISES POLYMERIZING THE MONOMER IN AN AQUEOUS SUSPENSION CONTAINING EXCESS ALKALI IN THE PRESENCE OF FINELY DIVIDED MAGNESIUM HYDROXIDE AS SOLE SUSPENSION STABILIZER, THE EXCESS ALKALI BEING 1% TO 10% MOLAR EXCESS RELATIVE TO THE MOLES OF MAGNESIUM HYDROXIDE PRESENT, WHEREBY RESIDUAL STABILIZER PARTICLES MAY BE REMOVED FROM THE FINISHED POLYMER SUSPENSION BY WASHING WITH AQUEOUS ACID.
References Cited (Backward Citations)
US2524627A
Cited
US2687408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |