US3428530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of chlorosilanes by distillation and thin-film evaporation
Assignee: Rhone Poulenc SA
•
Filing: 1966-09-08
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Granted: 1969-02-18
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Paul Charles Fauche
- 👤 Philippe Lacan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:31
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2890155A
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US2766193A
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US2895886A
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US2755295A
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US3099670A
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US2934549A
Cited
GB900457A
Cited
US3054444A
Cited
US3092587A
Cited
SU144501A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |