US3700614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact polypropylene blends
Assignee: Dart Industries Inc
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Filing: 1971-05-07
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Granted: 1972-10-24
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Expires: 1991-05-07
Abstract
Abstract THE ADDITION OF FINELY DIVIDED PARTICLES OF STEARIC ACID COATED CALCIUM CARBONATE TO BLENDS OF SUBSTANTIALLY CRYSTALLINE POLYMERS AND COPOLYMERS OF PROPYLENE AND AN ELASTOMERIC MATERIAL RESULTS IN A PRODUCT HAVING IMPROVED IMPACT STRENGTH AND IMPORVED FLEXURAL STIFFNESS OVER THE BLENDS WITHOUT THE FINELY DIVIDED PARTICLES.
Inventors
- 👤 Wiiliam F Schenkerberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/04; C08K5/09; C08K9/00; C08K9/04; C08L23/14; C08L23/142; C08L2205/00; C08L2205/03; C08L23/04; C08L23/06; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L2310/00
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |