US2652392A
Expired / Lapsed
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Suspension polymerization of unsaturated organic compounds
Assignee: HOHENSTEIN
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Filing: 1951-04-28
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Granted: 1953-09-15
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Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Hohenstein Walter Peter
- 👤 Haward Robert Nobbs
- 👤 Elly Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE POLYMERISATION IN AQUEOUS SUSPENSION OF UNSATURATED ORGANIC COMPOUNDS CONTAINING A CH2:C< GROUP IN THE MOLECULE, IN THE PRESENCE OF A MONOMER SOLUBLE POLYMERISATION CATALYST AND OF A CALCIUM PHOSPHATE AS SUSPENSION STABILISER, THE STEP WHICH COMPRISES ADDING TO THE AQUEOUS SUSPENSION UP TO 0.01% BY WEIGHT OF THE SYSTEM OF A WATER-SOLUBLE PERSULPHATE, THE TOTAL QUANTITY OF THE WATER SOLUBLE PERSULPHATE IN THE SUSPENSION NOT EXCEEDING .01%.
Claim 2
Dependent Claim
69 words
IN THE POLYMERISATION IN AQUEOUS SUSPENSION OF UNSATURATED ORGANIC COMPOUNDS CONTAINING A CH2:C< GROUP IN THE MOLECULE, IN THE PRESENCE OF A MONOMER SOLUBLE POLYMERISATION CATALYST AND OF A CALCIUM PHOSPHATE AS SUSPENSION STABILISER, THE STEP WHICH COMPRISES ADDING TO THE AQUEOUS SUSPENSION UP TO 0.01% BY WEIGHT OF THE SYSTEM OF A WATER-SOLUBLE PERSULPHATE, THE TOTAL QUANTITY OF THE WATER SOLUBLE PERSULPHATE IN THE SUSPENSION NOT EXCEEDING .01%.
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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |