Patent US2881149A successfully refreshed from Google Patents.
US2881149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardenable mixtures of an epoxy resin and a resin from formaldehyde and an arylamine and hardened products therefrom
Assignee: BASF Schweiz AG
•
Filing: 1957-03-27
•
Granted: 1959-04-07
•
Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Neut Jan Hendrik Van Der
- 👤 Renner Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:39
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
AN 1,2-EPOXY RESIN COMPOSITION HARDENABLE BY HEAT AND PRESSURE COMPRISING AS A HARDENER FOR THE 1,2-EPOXY RESIN A RESIN FROM FORMALDEHYDE AND AN ARYLAMINE OF THE FORMULA
Claim 2
Dependent Claim
27 words
AN 1,2-EPOXY RESIN COMPOSITION HARDENABLE BY HEAT AND PRESSURE COMPRISING AS A HARDENER FOR THE 1,2-EPOXY RESIN A RESIN FROM FORMALDEHYDE AND AN ARYLAMINE OF THE FORMULA
References Cited (Backward Citations)
US2414748A
Cited
US2687397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |