Patent US3102855A successfully refreshed from Google Patents.
US3102855A
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Talc beneficiation
Assignee: Johnson and Johnson
•
Filing: 1959-09-18
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Granted: 1963-09-03
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Expires: 1979-09-18
Abstract
No abstract record available.
Inventors
- 👤 Whitman E Brown
- 👤 Robert D Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:11
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/22; B; B03; B03D; B03D1/00; B03D1/001; B03D2201/00; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A POWDERED TALC CONTAINING LESS THAN 10% BY WEIGHT OF FINES OF PARTICLES SIZE OF LESS THAN 15 MICRONS OR LESS AND HAVING A PLATY TALC CONTENT IN EXCESS OF 93% BY WEIGHT.
Claim 2
Dependent Claim
33 words
A POWDERED TALC CONTAINING LESS THAN 10% BY WEIGHT OF FINES OF PARTICLES SIZE OF LESS THAN 15 MICRONS OR LESS AND HAVING A PLATY TALC CONTENT IN EXCESS OF 93% BY WEIGHT.
References Cited (Backward Citations)
US1250216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |