Patent US3822325A successfully refreshed from Google Patents.
US3822325A
Expired / Lapsed
US
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Preparation of copolymerizable unsaturated polyester resins
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1971-10-07
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Granted: 1974-07-02
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Expires: 1991-10-07
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS AND APPARATUS FOR THE PREPARATION, WITHOUT THE USE OF A CATALYST, OF PRACTICALLY COLORLESS COPOLYMERIZABLE UNSATURATED POLYESTER RESIN FROM AN ALKYLENE OXIDE.
Inventors
- 👤 P Thomas
- 👤 J Meyer
- 👤 M Prablanc
- 👤 H Blaise
- 👤 B Carre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C08G63/78; C08G63/785
Claims Analysis
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |