US2548780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing pelleted calcium oxide desiccant
Assignee: Filtrol Corp
•
Filing: 1946-09-19
•
Granted: 1951-04-10
•
Expires: 1966-09-19
Abstract
No abstract record available.
Inventors
- 👤 Wright W Gary
- 👤 Roger A Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:19
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/02; Y; Y10; Y10S; Y10S116/00; Y10S116/22; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE PROCESS OR PRODUCING A PELLETED CALCIUM OXIDE DESICCANT WHICH CONSISTS IN THE STEP IN SEQUENCE OF MIXING HYDRATED LIME WITH SUFFICIENT WATER TO FORM AN EXTRUDABLE MIX, EXTRUDING SAID MIX INTO STRANDS AND CUTTING THE STRANDS TO FORM PELLETS, DRYING THE PELLETS, AND HEATING THE DRIED PELLETS AT A TEMPERATURE BETWEEN 1300 AND 1800* F. TO CHANGE SAID HYDRATED LIME TO THE OXIDE WHICH, BY REASON OF THE PRESSURE OF SAID EXTRUSION STEP AND THE HEATING STEP, HAVE A VOLUMETRIC EXPANSION BELOW 100% ON PICK-UP OF 30% BY WEIGHT OF WATER VAPOR.
Claim 2
Dependent Claim
93 words
THE PROCESS OR PRODUCING A PELLETED CALCIUM OXIDE DESICCANT WHICH CONSISTS IN THE STEP IN SEQUENCE OF MIXING HYDRATED LIME WITH SUFFICIENT WATER TO FORM AN EXTRUDABLE MIX, EXTRUDING SAID MIX INTO STRANDS AND CUTTING THE STRANDS TO FORM PELLETS, DRYING THE PELLETS, AND HEATING THE DRIED PELLETS AT A TEMPERATURE BETWEEN 1300 AND 1800* F. TO CHANGE SAID HYDRATED LIME TO THE OXIDE WHICH, BY REASON OF THE PRESSURE OF SAID EXTRUSION STEP AND THE HEATING STEP, HAVE A VOLUMETRIC EXPANSION BELOW 100% ON PICK-UP OF 30% BY WEIGHT OF WATER VAPOR.
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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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |