Patent US3481900A successfully refreshed from Google Patents.
US3481900A
Expired / Lapsed
US
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Use of selected 4,4'-methylenebis (2,6-dialkylanilines) as curing agents for epoxy resins
Assignee: Uniroyal Chemical Co Inc
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Filing: 1967-03-28
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Granted: 1969-12-02
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Expires: 1987-03-28
Abstract
No abstract record available.
Inventors
- 👤 Norman K Sundholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:40
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2891927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |