US2709158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing mica pulp
Assignee: Samica Corp
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Filing: 1951-06-12
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Granted: 1955-05-24
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Expires: 1971-06-12
Abstract
No abstract record available.
Inventors
- 👤 Bouchet Antoine Jean Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:10
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PRODUCING MICA PULP COMPRISING THE STEPS OF HEATING MICA TO APPROXIMATELY 800*C. FOR SUFFICIENT TIME PARTIALLY TO OPEN UP TO LEAVES THREOF, INTRODUCING A SUBSTANTIALLY COOLER GAS INTO THE INTERSTICES BETWEEN SAID LEAVES FORMED BY SAID HEATING STEP, CONFINING SAID GAS BETWEEN SAID LEAVES BY IMMERSING THE SAME IN A LIQUID, AND THEREAFTER FURTHER EXFOLIATING SAID MICA IN SAID LIQUID BY AGITATING THE SAME AND BY EXPANDING SAID CONFINED GAS BY LOWERING THE PRESSURE ON THE SURFACE OF SAID LIQUID TO A VALVE SUBSTANTIALLY LOWER THAN THE PRESSURE OF SAID GAS BETWEEN SAID LEAVES AFTER SAID IMMERSION.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PRODUCING MICA PULP COMPRISING THE STEPS OF HEATING MICA TO APPROXIMATELY 800*C. FOR SUFFICIENT TIME PARTIALLY TO OPEN UP TO LEAVES THREOF, INTRODUCING A SUBSTANTIALLY COOLER GAS INTO THE INTERSTICES BETWEEN SAID LEAVES FORMED BY SAID HEATING STEP, CONFINING SAID GAS BETWEEN SAID LEAVES BY IMMERSING THE SAME IN A LIQUID, AND THEREAFTER FURTHER EXFOLIATING SAID MICA IN SAID LIQUID BY AGITATING THE SAME AND BY EXPANDING SAID CONFINED GAS BY LOWERING THE PRESSURE ON THE SURFACE OF SAID LIQUID TO A VALVE SUBSTANTIALLY LOWER THAN THE PRESSURE OF SAID GAS BETWEEN SAID LEAVES AFTER SAID IMMERSION.
References Cited (Backward Citations)
US686929A
Cited
US2549880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |