US3640919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed poly-1-butene
Assignee: Huels AG
•
Filing: 1969-05-12
•
Granted: 1972-02-08
•
Expires: 1989-05-12
Abstract
Abstract AN IMPROVEMENT IN THE PROCESS OF A FOAMING POLY-1BUTENE BY MIXING IT WITH A NITROGEN LIBERATING FOAMING AGENT, AND ORGANIC PEROXIDE WITH A DECOMPOSITION TEMPERATURE OF AT LEAST 170*C. ELEMENTARY SULFUR AND AN ORGANIC COMPOUND CONTAINING A PLURALITY OF ALLYL GROUPS.
Inventors
- 👤 Alfred Michels
- 👤 Josef Bittscheidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08F; C08F255/00; C08F255/08; C08F255/10; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/18
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |