Patent US3789041A successfully refreshed from Google Patents.
US3789041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melamine-formaldehyde resins containing clcium carbonate
Assignee: Standard Oil Co
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Filing: 1972-12-08
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Granted: 1974-01-29
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Expires: 1992-12-08
Abstract
Abstract MELAMINE-FORMALDEHYDE RESINS CONTAINIG 10 TO 900 PARTS BY WEIGHT OF CALCIUM CABRONATE PER HUNDRED PARTS OF RESIN ARE EXCELLENT FOR USE IN PREPARING MOLDED RESIN ARTICLES BECAUSE OF THE LOWER POST-MOLD SHRIKNAGE, THE IMPROVED IMPACT STRENGTH AND THE BETTER HEAT STABILITY THAN THE RESIN WITHOUT CALCIUM CARBONATE.
Inventors
- 👤 H Talsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:26
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08L; C08L61/00; C08L61/20; C08L61/26; C08L61/28
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |