US3490203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating sicl4 and sihcl3 from gas mixtures of such halosilanes with hydrogen
Assignee: Individual
•
Filing: 1968-01-17
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Granted: 1970-01-20
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Expires: 1988-01-17
Abstract
No abstract record available.
Inventors
- 👤 Harry Kloepfer
- 👤 Franz Ludwig Dahm
- 👤 Erwin Bohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C01B33/04; C01B33/107; C01B33/1071
Claims Analysis
Total Claims: 0
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |