US2863720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing synthetic mica product
Assignee: GTE Sylvania Inc
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Filing: 1956-04-26
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Granted: 1958-12-09
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Francis A Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A METHOD FOR PRODUCING RECRYSTALLIZED HOT PRESSED SHEET OF RECONSTITUTED SYNTHETIC MICA WHICH COMPRISES THE STEPS OF SATURATING THE SURFACES OF AN UNFRIED RECONSTITUTED SYNTHETIC MICA SHEET OF THE FLUORINE TYPE WITH LIQUID MEDIA CONTAINING A PLURALITY OF INORGANIC COMPOUNDS SELECTED FROM THE CLASS OF MINERALIZERS COMPOSED OF A FIRST GROUP OF FLUORINE COMPOUNDS WHICH, WHEN THE SATURATED SHEET IS HOT PRESSED, DECOMPOSE TO PRODUCE SILICON TETRAFLUORIDE VAPOR AND A SECOND GROUP OF FLUORINE COMPOUNDS WHICH, WHEN THE SATURATED SHEET IS HOT PRESSED, REACT WITH THE SILICA CONTAINED IN THE SHEET TO PRODUCE SILICON TETRAFLUORINE VAPOR, EACH COMPOUND IN SAID PLURALITY HAVING A DIFFERENT VOLATIZATION TEMPERATURE WHICH DOES NOT EXCEED 1340*C., SAID FIRST GROUP CONSISTING OF THE FLUOSILICATES OF MAGNESIUM, POTASSIUM, CALCIUM, NICKEL, LITHIUM AND COPPER, AND THE FLUORIDES OF POTASSIUM AND CADMIUM SAID SECOND GROUP CONSISTING OF THE FLUORIDES OF ALUMINUM AND AMMONIUM, THE ACID FLUORIDES OF AMMONIUM, BARIUM AND SODIUM, AND FLUOTITANATES AND SODIUM AND POTASSIUM; AND HOT PRESSING SAID SATURATED SHEET AT A TEMPERATURE FALLING WITHIN THE APPROXIMATE RANGE 1200*C.-1340*C. TO PRODUCE SAID RECRYSTALLIZED SHEET.
Claim 2
Independent Claim
178 words
A METHOD FOR PRODUCING RECRYSTALLIZED HOT PRESSED SHEET OF RECONSTITUTED SYNTHETIC MICA WHICH COMPRISES THE STEPS OF SATURATING THE SURFACES OF AN UNFRIED RECONSTITUTED SYNTHETIC MICA SHEET OF THE FLUORINE TYPE WITH LIQUID MEDIA CONTAINING A PLURALITY OF INORGANIC COMPOUNDS SELECTED FROM THE CLASS OF MINERALIZERS COMPOSED OF A FIRST GROUP OF FLUORINE COMPOUNDS WHICH, WHEN THE SATURATED SHEET IS HOT PRESSED, DECOMPOSE TO PRODUCE SILICON TETRAFLUORIDE VAPOR AND A SECOND GROUP OF FLUORINE COMPOUNDS WHICH, WHEN THE SATURATED SHEET IS HOT PRESSED, REACT WITH THE SILICA CONTAINED IN THE SHEET TO PRODUCE SILICON TETRAFLUORINE VAPOR, EACH COMPOUND IN SAID PLURALITY HAVING A DIFFERENT VOLATIZATION TEMPERATURE WHICH DOES NOT EXCEED 1340*C., SAID FIRST GROUP CONSISTING OF THE FLUOSILICATES OF MAGNESIUM, POTASSIUM, CALCIUM, NICKEL, LITHIUM AND COPPER, AND THE FLUORIDES OF POTASSIUM AND CADMIUM SAID SECOND GROUP CONSISTING OF THE FLUORIDES OF ALUMINUM AND AMMONIUM, THE ACID FLUORIDES OF AMMONIUM, BARIUM AND SODIUM, AND FLUOTITANATES AND SODIUM AND POTASSIUM; AND HOT PRESSING SAID SATURATED SHEET AT A TEMPERATURE FALLING WITHIN THE APPROXIMATE RANGE 1200*C.-1340*C. TO PRODUCE SAID RECRYSTALLIZED SHEET.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |