Patent US3328185A successfully refreshed from Google Patents.
US3328185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-filler composition
Assignee: WR Grace and Co
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Filing: 1963-08-30
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Granted: 1967-06-27
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Eric S Lind
- 👤 Donald I Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:22
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COMPOSITION CAPABLE OF FORMING A SUBSTANTIALLY STABLE HOT MELT DISPERSION COMPRISED OF 30 TO 45 PARTS BY WEIGHT OF A POLYAMIDE DERIVED BY CONDENSING AN ACID SELECTED FROM THE GROUP CONSISTING OF A POLYMERIC FATTY ACID AND A MIXTURE OF A POLYMERIC FATTY ACID AND A POLYBASIC ACID IN WHICH THE CARBOXYL GROUPS ARE SEPARATED BY AT LEAST 3 CABON ATOMS WITH A POLYAMINE AND 55 TO 70 PARTS BY WEIGHT OF CALCIUM CARBONATE PARTICLES HAVING A SPHERICAL SHAPE AND A PARTICLE SIZE RANGING FROM ABOUT 1 TO 50 MICRONS IN DIAMETER, SAID PARTICLES HAVING A MEAN DIAMETER SUFFICIENTLY LARGE TO PRODUCE A DISPERSION WITH A VISCOSITY NOT GREATER THAN 11,000CPS. AT 380*F.
Claim 2
Dependent Claim
114 words
A COMPOSITION CAPABLE OF FORMING A SUBSTANTIALLY STABLE HOT MELT DISPERSION COMPRISED OF 30 TO 45 PARTS BY WEIGHT OF A POLYAMIDE DERIVED BY CONDENSING AN ACID SELECTED FROM THE GROUP CONSISTING OF A POLYMERIC FATTY ACID AND A MIXTURE OF A POLYMERIC FATTY ACID AND A POLYBASIC ACID IN WHICH THE CARBOXYL GROUPS ARE SEPARATED BY AT LEAST 3 CABON ATOMS WITH A POLYAMINE AND 55 TO 70 PARTS BY WEIGHT OF CALCIUM CARBONATE PARTICLES HAVING A SPHERICAL SHAPE AND A PARTICLE SIZE RANGING FROM ABOUT 1 TO 50 MICRONS IN DIAMETER, SAID PARTICLES HAVING A MEAN DIAMETER SUFFICIENTLY LARGE TO PRODUCE A DISPERSION WITH A VISCOSITY NOT GREATER THAN 11,000CPS. AT 380*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |