US3556830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of fillers
Assignee: Rhone Poulenc SA
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Filing: 1968-02-23
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Granted: 1971-01-19
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Expires: 1988-02-23
Abstract
Abstract FINELY DIVIDED FILLERS ARE TREATED WITH ORGANOPOLYSIOXANES BY INTRODUCTION INTO THE TOP OF A COLUMN PROVIDED WITH BAFFLES, ORGANOPOLYSILOXANE VANPOUR BEING INTRODUCED TO THE BOTTOM OF THE COLUMN ALTERNATELY WITH INERT GAS INTRODUCED AT THE TOP OF THE COLUMN.
Inventors
- 👤 Jean-Jacques Charrin
- 👤 Pierre Joseph Frechet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:58
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1051; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C09C3/00; C09C3/12; C01; C01P; C01P2004/00; C01P2004/80
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |