US2995454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry binder and process for preparing the same
Assignee: Individual
•
Filing: 1957-02-26
•
Granted: 1961-08-08
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Handl Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B28/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A PROCESS FOR PREPARING A DRY BINDER WHICH CONSISTS ESSENTIALLY OF GRINDING A MIXTURE CONSISTING ESSENTIALLY OF BETWEEN 2 PERCENT AND 25 PERCENT BY VOLUME OF A DRY ALKALI METAL SILICATE, AND BETWEEN 2 PERCENT AND 25 PERCENT BY VOLUME OF A NON-ALKALI METAL SULPHATE SELECTED FROM THE GROUP CONSISTING OF SALTS OF ALUMINUM, FERROUS IRON, FERRIC IRON, COPPER, ZINC, MANGANESE, CHROMIUM AND NICKEL, THE BALANCE BEING SUBSTANTIALLY FINELYGROUND NATURALLY OCCURRING UNMODIFIED ANHYDRITE.
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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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |