Patent US3484371A successfully refreshed from Google Patents.
US3484371A
Expired / Lapsed
US
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Process for the production of hydrophobic particulate materials from water glass
Assignee: Evonik Operations GmbH
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Filing: 1966-12-12
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Granted: 1969-12-16
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Hanns Biegler
- 👤 Wesseling Bezirk
- 👤 Gottfried Kallrath
- 👤 Kurt Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:41
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325; B; B01; B01J; B01J2/00; B01J2/02; B01J2/04; C01B33/113; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
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) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |