US3823098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming unsaturated polyester resins
Assignee: Individual
•
Filing: 1973-04-09
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Granted: 1974-07-09
•
Expires: 1993-04-09
Abstract
Abstract UNSATURATED POLYESTER RESIN ARE PREPARED WITH THE AID OF A PROFOAMER WHICH IS A COPOLYMER CONSISTING ESSENTIALLY OF (A) SIO2 UNITS (B) CH3)3SIO1/2 UNITS AND (C) (R-)2-N-R''-SI(-R")N-O((3-N)/2) UNITS WHEREIN N HAS A VALUE FROM 0 TO 2, R" IS AN ALKYL RADICAL CONTAINING FROM 1 TO 18 CARBON ATOMS AND ALKYLENE RADICAL CONTANING FROM 1 TO 18 CARBON ATOMS AND EACH R IS SELECTED FROM THE GROUP CONSISTING OF THE HYROGEN ATOM, ALKYL RADICALS CONTAINING FROM1 TO 18 CARBON ATOMS AND AMINOALKYL RADICALS CONTAINING FROM 2 TO 18 CARBON ATOMS, THE RATIO OF THE (B) UNITS TO THE SUM OF THE (A) AND (C) UNITS IN THE COPOLYMER BEING IN THE RANGE OF 0.4:1 TO 1.2:1.
Inventors
- 👤 W Joslyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:46
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2367/00; C08J2367/06; C08J2483/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 0
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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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |