US2580277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinyl chloride in aqueous suspension to produce granular polymers
Assignee: Monsanto Chemicals Ltd
•
Filing: 1948-06-22
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Granted: 1951-12-25
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Expires: 1968-06-22
Abstract
No abstract record available.
Inventors
- 👤 Boyd Thomas
- 👤 Fred J Lucht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR PREPARING FINE-GRAINED POLYMERIC PRODUCTS WHICH COMPRISES POLYERIZING A POLYMERIZABLE MATERIAL CONTAINING VINYL CHLORIDE WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING, AS TH SOLE DISPERSING AGENT, FROM 0.1 TO 3% BY WEIGHT OF AN ALIPHATIC ACID ESTER OF A POLYETHYLENE GLYCOL, THE GLYCOL RESIDUE OF SAID ESTER HAVING AN AVERAGE MOLECUALR WEIGHT OF FROM 400 TO 4000, AND THE ACID RESIDUE HAVING FROM 10-20 CARBON ATOMS.
Claim 2
Dependent Claim
68 words
A PROCESS FOR PREPARING FINE-GRAINED POLYMERIC PRODUCTS WHICH COMPRISES POLYERIZING A POLYMERIZABLE MATERIAL CONTAINING VINYL CHLORIDE WHILE DISPERSED IN AN AQUEOUS MEDIUM CONTAINING, AS TH SOLE DISPERSING AGENT, FROM 0.1 TO 3% BY WEIGHT OF AN ALIPHATIC ACID ESTER OF A POLYETHYLENE GLYCOL, THE GLYCOL RESIDUE OF SAID ESTER HAVING AN AVERAGE MOLECUALR WEIGHT OF FROM 400 TO 4000, AND THE ACID RESIDUE HAVING FROM 10-20 CARBON ATOMS.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |