Patent US2920123A successfully refreshed from Google Patents.
US2920123A
Expired / Lapsed
US
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Production of acetylene by pyrolysis
Assignee: Dow Chemical Co
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Filing: 1956-10-01
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Granted: 1960-01-05
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Charles F Oldershaw
- 👤 Charles A Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:33
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE PYROLYSIS TO ACETYLENE OF FEED MATERIALS COMPRISING ESSENTIALLY METHANE WHEREIN PYROLYSIS IS EFFECTED BY PASSING SAID FEED MATERIALS INTO CONTACT WITH A SURFACE HEATED TO PYROLYSIS TEMPERATURE AND A SOFT CARBON IS FORMED THEREON DURING THE CONTACT OF SAID FEED MATERIALS, THE IMPROVEMENT WHICH COMPRISES PASSING SAID FEED MATERIALS INTO CONTACT WITH THE HEATED SURFACE SUCH THAT THE HEATED SURFACE IS SUBJECTED TO THE FEED MATERIALS FOR A PERIOD OF TIME NOT GREATER THAN 5 SECONDS AND SUBSEQUENTLY REMOVING THE SOFT CARBON FROM THE SURFACE.
Claim 2
Dependent Claim
87 words
IN THE PYROLYSIS TO ACETYLENE OF FEED MATERIALS COMPRISING ESSENTIALLY METHANE WHEREIN PYROLYSIS IS EFFECTED BY PASSING SAID FEED MATERIALS INTO CONTACT WITH A SURFACE HEATED TO PYROLYSIS TEMPERATURE AND A SOFT CARBON IS FORMED THEREON DURING THE CONTACT OF SAID FEED MATERIALS, THE IMPROVEMENT WHICH COMPRISES PASSING SAID FEED MATERIALS INTO CONTACT WITH THE HEATED SURFACE SUCH THAT THE HEATED SURFACE IS SUBJECTED TO THE FEED MATERIALS FOR A PERIOD OF TIME NOT GREATER THAN 5 SECONDS AND SUBSEQUENTLY REMOVING THE SOFT CARBON FROM THE SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |