Patent US2982621A successfully refreshed from Google Patents.
US2982621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for producing after-treated carbon black
Assignee: Cabot Corp
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Filing: 1955-12-28
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Granted: 1961-05-02
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 Merrill E Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:34
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; B; B01; B01J; B01J19/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
THE PROCESS OF PRODUCING AFTER-TREATED IMPINGEMENT CARBON BLACK WHICH INCLUDES THE STEPS OF DEPOSITING CARBON BLACK BY IMPINGEMENT UPON A DOWNWARDLY DIRECTED SURFACE WITHIN AN ENCLOSED SPACE TO FORM A SHALLOW LAYER OF CARBON BLACK ON SAID SURFACE, INVERTING THE SURFACE AND TRANSFERRING THE DEPOSITED CARBON BLACK INTO UPWARDLY DIRECTED POSITION WITHOUT SUBSTANTIALLY DISTURBING THE CARBON BLACK ON SAID SURFACE, MEANWHILE MOVING SAID SURFACE INTO A SECOND ENCLOSED SPACE SEPARATED FROM SAID FIRST SPACE, AND SUBJECTING THE CARBON BLACK IN SAID
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |