Patent US4518786A successfully refreshed from Google Patents.
US4518786A
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N,N,N',N'-tetraglycidyl-1,3-propylene bis(p-aminobenzoate
Assignee: Wyeth Holdings LLC
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Filing: 1983-08-01
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Granted: 1985-05-21
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Expires: 2003-08-01
Abstract
Abstract A polyfunctional epoxy compound, N,N,N',N'-tetraglycidyl-1,3-propylene bis(p-aminobenzoate) is disclosed useful as an epoxide resin. Also disclosed are polymers of such compound formed by reaction with aromatic polyamines which are useful as structural resins, e.g., as advanced composite matrix resins.
Inventors
- 👤 David W. Wang
- 👤 Daniel R. Draney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:37
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D303/00; C07D303/02; C07D303/36; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/32; C08G59/38; C08G59/40; C08G59/50; C08G59/52; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; C08L; C08L63/00; C08L79/00; C08L79/04; C08L79/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
N,N,N',N'-tetraglycidyl-1,3-propylene-bis-(p-aminobenzoate).
Claim 2
Dependent Claim
1 words
N,N,N',N'-tetraglycidyl-1,3-propylene-bis-(p-aminobenzoate).
References Cited (Backward Citations)
GB907844A
Cited
US2629733A
Cited
US3932360A
Cited
US4269759A
Cited
US4451645A
Cited
US4451645B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |