US2549880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for treating mica and composition
Assignee: Prosilis
•
Filing: 1945-07-16
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Granted: 1951-04-24
•
Expires: 1965-07-16
Abstract
No abstract record available.
Inventors
- 👤 Bardet Jacques Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:46
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; Y; Y10; Y10S; Y10S106/00; Y10S106/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR THE CONVERSION OF MICA, INITIALLY IN THE FORM OF BLOCKS, SHEETS OR THE LIKE INTO A PULP SUITABLE FOR CONVERSION INTO SHEET FORM BY CONVENTIONAL PAPER MAKING METHODS AND FOR CONVERSION INTO MOLDED FORM BY THE ACTION OF HEAT AND PRESSURE, WHICH COMPRISES HEATING THE MICA TO ABOUT 800* C., IMMERSING THE HOT MICA INTO A FIRST SOLUTION, DRAINING OFF EXCESS SOLUTION, AND THEN IMMERSING THE MICA INTO A SECOND SOLUTION WHICH REACTS WITH THE FIRST SOLUTION WITH EVOLUTIUON OF GAS, AND MAINTAINING SUCH IMMER SION UNTIL CLEAVAGE OF THE MICA INTO FLAKE FORM IS ACCOMPLISHED, AND THEN DISINTEGRATING THE RESULTANT FLAKES BY SIMPLE AGITATION THEREOF IN THE SAID SECOND SOLUTION UNTIL A MICA PULP IS FORMED ONE OF THE SAID SOLUTIONS BEING A CONCENTRATED SOLUTION OF A SOLUBLE CARBONATE AND THE OTHER A SOLUTION OF A STRONG ACID.
Claim 2
Independent Claim
142 words
A METHOD FOR THE CONVERSION OF MICA, INITIALLY IN THE FORM OF BLOCKS, SHEETS OR THE LIKE INTO A PULP SUITABLE FOR CONVERSION INTO SHEET FORM BY CONVENTIONAL PAPER MAKING METHODS AND FOR CONVERSION INTO MOLDED FORM BY THE ACTION OF HEAT AND PRESSURE, WHICH COMPRISES HEATING THE MICA TO ABOUT 800* C., IMMERSING THE HOT MICA INTO A FIRST SOLUTION, DRAINING OFF EXCESS SOLUTION, AND THEN IMMERSING THE MICA INTO A SECOND SOLUTION WHICH REACTS WITH THE FIRST SOLUTION WITH EVOLUTIUON OF GAS, AND MAINTAINING SUCH IMMER SION UNTIL CLEAVAGE OF THE MICA INTO FLAKE FORM IS ACCOMPLISHED, AND THEN DISINTEGRATING THE RESULTANT FLAKES BY SIMPLE AGITATION THEREOF IN THE SAID SECOND SOLUTION UNTIL A MICA PULP IS FORMED ONE OF THE SAID SOLUTIONS BEING A CONCENTRATED SOLUTION OF A SOLUBLE CARBONATE AND THE OTHER A SOLUTION OF A STRONG ACID.
References Cited (Backward Citations)
US1320509A
Cited
US686929A
Cited
US847910A
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AT96336B
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US1870835A
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US2108577A
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GB553104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |