US2698256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siliceous composition and method for manufacturing the same
Assignee: GREAT LAKES CARBON Corp
•
Filing: 1950-01-12
•
Granted: 1954-12-28
•
Expires: 1970-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick L Shea
- 👤 Harry L Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:07
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
A PRODUCT HAVING A HIGH REACTIVITY TO LIME CONSISTING ESSENTIALLY OF A FINE PARTICLED MATERIAL HAVING A BASE OF DIATOMACEOUS EARTH WHICH IS INTEGRALLY COATED WITH AMORPHOUS SILICA, SAID PRODUCT HAVING A BULK DENSITY OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |