US3567689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends of amino-formaldehyde prepolymers and divalent metal salts of dibasic organic acids
Assignee: Unifrax I LLC
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Filing: 1968-06-24
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Granted: 1971-03-02
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Expires: 1988-06-24
Abstract
Abstract METAL SALTS OF ALKANEDIOIC AND AROMATIC DIBASIC ACIDS ARE USED TO IMPROVE ONE OR MORE OF THE PHYSICAL PROPERTIES OF CERTAIN THERMOPLASTIC AND THERMOSETTING RESINS, EITHER BEFORE OR AFTER EXPOSURE TO HIGH TEMPERATURES.
Inventors
- 👤 James Economy
- 👤 Luis C Wohrer
- 👤 John H Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:42
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |