US3708993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solidified gas pellets and apparatus for manufacturing
Assignee: HARDT ANDREW
•
Filing: 1969-11-12
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Granted: 1973-01-09
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Expires: 1989-11-12
Abstract
Abstract Carbon dioxide pellets of a high density formed in a manner to break easily into minute pieces yet not agglomerate during shipment, together with a head member for a pellet machine to form pellets of this kind.
Inventors
- 👤 R Hardt
- 👤 E Kozlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 01:49
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/50; C01B32/55
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
The method of claim 1 wherein successive portions of the solid carbon dioxide plug are first pasSed through a straight wall section of said passage.
Claim 2
Dependent Claim
24 words
The method of claim 1 wherein successive portions of the solid carbon dioxide are first passed through a converging wall section of said passage.
Claim 3
Dependent Claim
17 words
The method of claim 3 wherein said passage has a length to diameter ratio of about 1:1.
Claim 4
Independent Claim
133 words
An apparatus for making rod-like carbon dioxide pellets, comprising a closed chamber, means for flashing liquefied carbon dioxide into said chamber to form carbon dioxide snow, an extrusion head at one end of said chamber, said head having a compression side and a discharge side and at least one passage having a length about equal to its diameter and a frusto-conical section with an included angle not exceeding 15* communicating with said sides of said head, said passage having its widest dimension proximate to said discharge side of said head, a ram reciprocable in said chamber toward and away from said head, the end of said ram at the end of its compression stroke terminating short of said compression side a distance sufficient to provide a plug of compacted snow across said passage.
Claim 5
Dependent Claim
50 words
The apparatus as defined in claim 5 wherein each said passage is about one-half inch long and further includes a converging wall portion with the widest dimension in direct communication with the compression side of said head, the diameter of said passage being from three-eights to five-eights of an inch.
Claim 6
Dependent Claim
39 words
The apparatus as defined in claim 5 wherein each said passage further includes an annular straight wall section in direct communication with the compression side of said head at one end and said conical section at the other end.
Claim 7
Dependent Claim
24 words
The apparatus as defined in claim 6 wherein said converging wall and said conical section are contiguous in said head at their narrowest dimensions.
Claim 8
Dependent Claim
34 words
The apparatus as defined in claim 8 wherein a plurality of said passages are disposed in a circular manner in said head with an additional passage disposed in the center of said circular arrangement.
Claim 9
Dependent Claim
19 words
The apparatus as defined in claim 6 wherein said conical section has a narrower taper than said converging wall.
References Cited (Backward Citations)
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Cited
US2149920A
Cited
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Cited
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Cited
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Cited
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Cited
US3576112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |