US2890228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New polyamide like condensation products and process of producing the same
Assignee: Reichhold Chemicals Inc
•
Filing: 1956-02-27
•
Granted: 1959-06-09
•
Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Forster Wolfgang Curt Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING NEW RESINOUS PRODUCTS WHICH COMPRISES EPOXIDIZING AT LEAST ONE MEMBER OF A GROUP CONSISTING OF ETHYLENICALLY UNSATURATED VEGETABLE AND ANIMAL FAT ACIDS AND ESTERS THEREOF WITH SATURATED ALIPHATIC MONOHYDRIC ALCOHOLS HAVING A BOILING POINT NOT ABOVE 200* C. AND MIXTURES THEREOF TO PRODUCE A PRODUCT HAVING AN OXIRANE OXYGEN CONTENT OF ABOUT 4%, ADDING ABOUT 1/6-2/5 OF ITS WEIGHT AN ALIPHATIC POLYAMINE REPRESENTED BY THE FORMULA R--NH--CH2--CH2--NH2, WHERE R IS A MEMBER OF THE GROUP CONSISTING OF H AND --(CH2CH2NH2), AND SUBSEQUENTLY HEATING AT ABOUT TWO HOURS AT ABOUT 140* C. AND SUBSEQUENTLY HEATING AT ABOUT 200* C. FOR ABOUT ONE HOUR.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRODUCING NEW RESINOUS PRODUCTS WHICH COMPRISES EPOXIDIZING AT LEAST ONE MEMBER OF A GROUP CONSISTING OF ETHYLENICALLY UNSATURATED VEGETABLE AND ANIMAL FAT ACIDS AND ESTERS THEREOF WITH SATURATED ALIPHATIC MONOHYDRIC ALCOHOLS HAVING A BOILING POINT NOT ABOVE 200* C. AND MIXTURES THEREOF TO PRODUCE A PRODUCT HAVING AN OXIRANE OXYGEN CONTENT OF ABOUT 4%, ADDING ABOUT 1/6-2/5 OF ITS WEIGHT AN ALIPHATIC POLYAMINE REPRESENTED BY THE FORMULA R--NH--CH2--CH2--NH2, WHERE R IS A MEMBER OF THE GROUP CONSISTING OF H AND --(CH2CH2NH2), AND SUBSEQUENTLY HEATING AT ABOUT TWO HOURS AT ABOUT 140* C. AND SUBSEQUENTLY HEATING AT ABOUT 200* C. FOR ABOUT ONE HOUR.
References Cited (Backward Citations)
US2518148A
Cited
US2585115A
Cited
US2445892A
Cited
US2495305A
Cited
US2485160A
Cited
US2823323A
Cited
US2682514A
Cited
GB737697A
Cited
US2682515A
Cited
US2761870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |