Patent US3816375A successfully refreshed from Google Patents.
US3816375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for curing a prepolymerized furan binder
Assignee: Qo Chemicals Inc
•
Filing: 1972-01-31
•
Granted: 1974-06-11
•
Expires: 1992-01-31
Abstract
Abstract This invention relates to a process for curing a partially perpolymerized furfuryl alcohol-aldehyde binder with a specified acid salt of an aromatic amine, said binder useful for example in the preparation of fiber glass laminates.
Inventors
- 👤 K Bozer
- 👤 L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:07
CPC Classifications
C; C08; C08L; C08L61/00; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; C08J2361/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
The process as in claim 1 wherein the catalyst is a member selected from the group consisting of N-methylaniline hydrochloride, N-ethylaniline hydrochloride, N-isopropylaniline hydrochloride, N,N-dimethylaniline hydrochloride, N,N-diethylaniline hydrochloride, o-ethylaniline hydrochloride, 2,3-dimethylaniline hydrochloride, 2-methyl-6-ethylaniline hydrochloride, 2,6-diisopropylaniline hydrochloride, tribromoaniline hydrochloride, N-ethylaniline hydrobomide, o-phenylenediamine monohydrochloride, o-phenylenediamine dihydrochloride.
Claim 2
Dependent Claim
29 words
The process as in claim 1 wherein the catalyst is present in an amount between 2 and 7 percent by weight based on the weight of the binder composition.
Claim 3
Dependent Claim
21 words
The process as in claim 1 which additionally comprises heating the catalyzed binder composition to the initiation temperature of the catalyst.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |