Patent US4977996A successfully refreshed from Google Patents.
Patent US2681391A successfully refreshed from Google Patents.
Patent US3910165A successfully refreshed from Google Patents.
Patent US1064030A successfully refreshed from Google Patents.
Patent US2580277A successfully refreshed from Google Patents.
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
•
Granted: 1951-12-25
•
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
2026-11-01 08:32
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)
US1970578A
Cited
US2395344A
Cited
US2366306A
Cited
US2445970A
Cited
US2511593A
Cited
US2449489A
Cited
US2470909A
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 |