Patent US3563907A successfully refreshed from Google Patents.
US3563907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage stable liquid compositions useful as curatives
Assignee: Pharmacia and Upjohn Co
•
Filing: 1967-11-17
•
Granted: 1971-02-16
•
Expires: 1987-11-17
Abstract
Abstract NOVEL STORAGE STABLE LIQUID COMPOSITIONS ARE PREPARED BY ADMIXING TWO NORMALLY SOLID PRIMARY POLYAMINES; NAMELY, METHYLENE POLYPHENYL POLYAMINES AND HEXAMETHYLENE DIAMINE. THE MIXTURES OF POLYAMINES REMAINS LIQUID AT TEMPERATURES ABOVE 5*C. THE NOVEL MIXTURES OF POLYAMINES CAN BE USED AS EPOXY RESIN CURATIVES, POLYURETHANE EXTENDERS AND FOR ALL PURPOSES FOR WHICH THE INDIVIDUAL COMPONENTS ARE CONVENTIONALLY EMPLOYED.
Inventors
- 👤 Herbert G Nadeau
- 👤 Paul H Waszeciak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:45
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |