US2883040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic porous filler for cylinders and method of producing same
Assignee: Union Carbide Corp
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Filing: 1953-04-27
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Granted: 1959-04-21
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Anton S Pater
- 👤 John W Houser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:52
CPC Classifications
C; C10; C10L; C10L3/00; C10L3/02; C10L3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
AN ACETYLENE CONTAINER COMPRISING A CLOSED CYLINDER SHELL; A CURED AND DRIED MONOLITHIC FILLER MASS IN SAID SHELL HAING SMALL SUBSTANTIALLY UNIFORMLY DISTRIBUTED PORES, A DENSITY NOT GREATER THAN 20 POUNDS PER CUBIC FOOT, A CRUSHING STRENGTH GREATER THAN 200 POUNDS PER SQUARE INCH, AND A POROSITY OF OVER 86% TO ABOUT 93%, SAID MASS COMPRISING MAINLY CALCIUM SILICATE IN WHICH THE RATIO OF SILICA AS SILICON DIOXIDE TO CALCIUM AS CALCIUM OXIDE IS FROM 1 TO 1.5 SAID MASS ALSO CONTAINING BETWEEN 4 AND 20% OF AN INERT MINERAL FIBER TOGETHER WITH MINOR AMONTS OF OTHER FILLER MODIFYING MATERIAL; AND A CLEARANCE SPACE BETWEEN THE CURED AND DRIED FILLER MASS AND THE INNER WALLS OF SAID SHELL, THE TOTAL THICKNESS OF SAID CLEARANCE SPACE BEING NO LESS THAN ABOUT 1/64 INCH AND NOT GREATER THAN 1/8 INCH.
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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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |