US3679628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester moulding compositions containing boron nitride
Assignee: Hoechst AG
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Filing: 1970-07-22
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Granted: 1972-07-25
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Expires: 1990-07-22
Abstract
Abstract POLYESTER COMPOSITIONS SUITABLE FOR INJECTION MOULDING ARE PROVIDED WHICH DO NOT EXHIBT DISCOLORATION OR DISCOLOR TO A MINOR EXTENT ONLY DURING MANUFACTURING AND PROCESSING. THE COMPOSITIONS CONSIST OF LINEAR SATURATED POLYESTERS, BORON NITRIDE AND COMPOUNDS CONTAINING S-O-NA OR P-O-NA GROUPS IN THEIR CHEMICAL STRUCTURE.
Inventors
- 👤 Ludwig Brinkmann
- 👤 Walter Herwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/38; C08K13/00; C08K13/02
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |