US3787525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of polyurethane powders using polyvinyl pyrrolidone having side chains from copolymerization with alkylated olefins
Assignee: DVSG Holding GmbH
•
Filing: 1972-08-07
•
Granted: 1974-01-22
•
Expires: 1992-08-07
Abstract
Abstract METHOD FOR PREPARING POLYURETHANE RESINS DIRECTLY IN FINELY DIVIDED FORM BY REACTION IN AN INERT ORGANIC LIQUID MEDIUM OF A FIRST REACTANNT, MISCIBLE WITH THE ORGANIC LIQUID MEDIUM, AND A SECOND REACTANT IMMISCIBLE AND EMULSIFIED AS FINE DROPLETS IN A CONTINUOUS PHASE OF THE LIQUID MEDIUM WITH THE AID OF SPECIAL SURFACTANTS. THE REACTION FORMS A FINELY DIVIDED REACTION PRODUCT INSOLUBLE IN THE LIQUID MEDIUM.
Inventors
- 👤 J Mcgarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S528/00; Y10S528/902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |