Patent US3231649A successfully refreshed from Google Patents.
US3231649A
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Compaction method
Assignee: Pullman Inc
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Filing: 1964-04-17
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Granted: 1966-01-25
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Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:01
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; Y; Y10; Y10S; Y10S425/00; Y10S425/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A METHOD OF COMPACTING PARTICULATE MATERIAL WHICH COMPRISES: CONTACTING PARTICULATE MATERIAL HAVING NONCONDENSABLE MATERIAL ASSOCIATED THEREWITH WITH A VAPOR STRIPPING AGENT TO DISPLACE THE NON-CONDENSABLE MATERIAL, AND THEN COMPACTING SAID THUS-CONTACTED PARTICULATE MATERIAL BY THE APPLICATION OF PRESSURE IN THE PRESENCE OF SAID VAPOR STRIPPING AGENT, SAID VAPOR STRIPPING AGENT HAVING PROPERTIES SUCH THAT IS IS CONDENSABLE UNDER COMPACTION CONDITIONS AND BEING SELECTED FROM THE GROUP CONSISTING OF DIFLUORODICHLOROMETHANE, MONOCHLORODIFLUOROMETHANE, SULFUR DIOXIDE, AMMONA, METHYL CHLORIDE, PROPANE, AND METHYL ETHER.
References Cited (Backward Citations)
US2630623A
Cited
US2517707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |