Patent US3787527A successfully refreshed from Google Patents.
US3787527A
Expired / Lapsed
US
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Process for the setting of unsaturated polyester resins
Assignee: ELECTROCHEM WERKE MUNICH AG
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Filing: 1971-10-14
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Granted: 1974-01-22
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Expires: 1991-10-14
Abstract
Abstract PROCESS FOR SETTING UNSATURATED POLYESTER RESINS WHICH COMPRISES CONTACTING SUCH A POLYESTER RESIN WITH A MIXTURE OF A PERESTER AND A TERTIARY HYDROPEROXIDE AS SETTING CATALYST, THE WEIGHT RATIO OF THE PERESTER TO SAID TERTIARY HYDROPEROXIDE BEING FROM 90:10 TO 10:90.
Inventors
- 👤 H Schwarzer
- 👤 H Twittenhoff
- 👤 H Meyer
- 👤 D Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:07
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/918
Claims Analysis
Total Claims: 0
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |