Patent US3658728A successfully refreshed from Google Patents.
US3658728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing moldings from polyepoxides and polyamines
Assignee: BASF SE
•
Filing: 1969-07-10
•
Granted: 1972-04-25
•
Expires: 1989-07-10
Abstract
Abstract PRODUCTION OF MOLDINGS AND COATINGS FROM A POLYEPOXIDE AND A CURING AGENT COMPRISING A LIQUID POLYAMINE/ALKYLPHENOL ADDUCT HAVING A MOLAR RATIO OF AMINO GROUPS TO PHENOLIC HYDROXY GROUPS OF ABOUT 1:1.
Inventors
- 👤 Herwig Hoffmann
- 👤 Oskar Lissner
- 👤 Heinrich Scholz
- 👤 Karl Merkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |