Patent US3473890A successfully refreshed from Google Patents.
US3473890A
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US
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Process for producing finely-divided,precipitated silicates and double silicates
Assignee: Evonik Operations GmbH
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Filing: 1966-07-26
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Granted: 1969-10-21
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Expires: 1986-07-26
Abstract
No abstract record available.
Inventors
- 👤 Helmut Reinhardt
- 👤 Peter Nauroth
- 👤 Karl Achenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:53
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; A; A23; A23L; A23L2/00; A23L2/70; A23L2/80; A23L2/82; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; C01B33/26; C01B33/40; C01B33/46; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0408
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |