US2953365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for continuous calcination of gypsum and the like
Assignee: Individual
•
Filing: 1956-12-17
•
Granted: 1960-09-20
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank J Mcentee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:52
CPC Classifications
C; C04; C04B; C04B11/00; C04B11/02; C04B11/028
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
APPARATUS FOR HEAT TREATING PULVERIZED GYPSUM AND THE LIKE COMPRISING A VERTICALLY DISPOSED REACTION VESSEL HAVING AN ENCLOSING SHELL WITH TOP AND BOTTOM CLOSURES, A PLURALITY OF HIGH HEAT-CONDUCING TUBULAR MEMBERS DISPOSED WITHIN SAID VESSEL AND EXTENDING THROUGH SAID VESSEL; MEANS ASSOCIATED WITH SAID TUBULAR MEMBERS FOR DIRECTING THE MATERIAL FLOW IN A VERTICAL DIRECTION; MEANS FOR CIRCULATING A HEAT TRANSFER MEDIUM IN EACH OF SAID TUBULAR MEMBERS; MEANS DISPOSED HORIZONTALLY ACROSS SAID VESSEL DIVIDING SAID VESSEL INTO VERTICALLY DISPOSED ZONES; FLUIDIZER INJECTING MEANS FOR INTRODUCING A FLUIDIZING MEDIUM AT THE BOTTOM OF EACH OF SAID ZONES; FEED MEANS FOR INTRODUCING RAW PULVERIZED GYPSUM OR THE LIKE ADJACENT ONE END OF SAID VESSEL; AND DISCHARGE MEANS FOR REMOVING THE PRODUCT FROM THE OPPOSITE END OF SAID VESSEL.
References Cited (Backward Citations)
US1967029A
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US2584312A
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US2639215A
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US2525790A
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US2619451A
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US2761668A
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US2729428A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |