Patent US3661810A successfully refreshed from Google Patents.
US3661810A
Expired / Lapsed
US
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Nonclumping thermoplastic particles and process of making same
Assignee: BASF Corp
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Filing: 1970-06-17
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Granted: 1972-05-09
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Expires: 1990-06-17
Abstract
Abstract CLUMPING OF THERMOPLASTIC PARTICLES IS PREVENTED BY MIXING THE PARTICLES WITH FINELY DIVIDED HYDROPHOBIC SILICA POWDER. THE MIXTURE RETAINS ITS FREE-FLOWING CHARACTERISTICS DURING STORAGE.
Inventors
- 👤 Herbert Gahmig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; C08J3/00; C08J3/12; C08J3/124
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |