US3570775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mica delamination
Assignee: General Electric Co
•
Filing: 1967-12-21
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Granted: 1971-03-16
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Expires: 1987-12-21
Abstract
Abstract Flakes of micaceous material are delaminated by passing them at increasing speed through a progressively restricted annular space formed by a cylinder and a rotating inner rotor. The finely divided product is useful in making paper.
Inventors
- 👤 Donald C Stavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:37
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16; B02C19/00; B02C19/0056
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
Apparatus for delaminating micaceous material in liquid suspension comprising: a. a closed cylinder having inlet and outlet means for said liquid suspension; and b. a rotor mounted within said cylinder and adapted for rotation about its longitudinal axis and that of said cylinder, the outer periphery of said rotor and the inner wall of said cylinder being essentially smooth and defining a progressively restricted annular passage in a downstream direction to a throat portion for passage therethrough of the mica suspension.
Claim 2
Dependent Claim
81 words
Apparatus for delaminating micaceous material in liquid suspension comprising: a. a closed cylinder having inlet and outlet means for said liquid suspension; and b. a rotor mounted within said cylinder and adapted for rotation about its longitudinal axis and that of said cylinder, the outer periphery of said rotor and the inner wall of said cylinder being essentially smooth and defining a progressively restricted annular passage in a downstream direction to a throat portion for passage therethrough of the mica suspension.
Claim 3
Dependent Claim
14 words
Apparatus as in claim 1 where said rotor is tapered in an upstream direction.
Claim 4
Dependent Claim
16 words
Apparatus as in claim 1 where the inner cylinder wall is tapered in an upstream direction.
Claim 5
Dependent Claim
14 words
Apparatus as in claim 3 where the periphery of said rotor is essentially cylindrical.
Claim 6
Dependent Claim
12 words
Apparatus as in claim 2 where said cylinder wall is essentially cylindrical.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |