Patent US2763602A successfully refreshed from Google Patents.
US2763602A
Expired / Lapsed
US
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Process for the production of pitch from petroleum residues
Assignee: Godfrey L Cabot Inc
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Filing: 1953-02-06
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Granted: 1956-09-18
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Expires: 1973-02-06
Abstract
No abstract record available.
Inventors
- 👤 Harvey M Cole
- 👤 Robert N Secord
- 👤 Kenneth P Seltzer
- 👤 Jr Charles B Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:50
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PRODUCTION OF PITCH FROM PETROLEUM RESIDUES, WHICH COMPRISES THE STEPS OF DISTILLING A MEASURED CHARGE OF PETROLEUM RESIDUE WHILE AGITATING THE CHARGE, WITHDRAWING DISTILLATE AT THE AVERAGE RATE OF ABOUT 0.2 TO 0.4% PER MINUTE OF THE VOLUME OF THE ORIGINAL CHARGE AND CONTINUOUSLY REFLUXING THE REMAINDER OF THE DISTILLATE TO THE CHARGE, CONTINUING DISTILLATION UNTIL 40% TO 50% OF THE VOLUME OF THE ORIGINAL CHARGE REMAINS, AND DRAWING OFF THE REMAINING MATERIAL AS THE PITCH PRODUCT WITH A CONTENT NOT BELOW 8% OF HYDROCARBONS INSOLUBLE IN NITROBENZENE AND A CONTENT NOT BELOW ABOUT 20% OF HYDROCARBONS SOLUBLE IN NITROBENZENE BUT INSOLUBLE IN ACETONE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PRODUCTION OF PITCH FROM PETROLEUM RESIDUES, WHICH COMPRISES THE STEPS OF DISTILLING A MEASURED CHARGE OF PETROLEUM RESIDUE WHILE AGITATING THE CHARGE, WITHDRAWING DISTILLATE AT THE AVERAGE RATE OF ABOUT 0.2 TO 0.4% PER MINUTE OF THE VOLUME OF THE ORIGINAL CHARGE AND CONTINUOUSLY REFLUXING THE REMAINDER OF THE DISTILLATE TO THE CHARGE, CONTINUING DISTILLATION UNTIL 40% TO 50% OF THE VOLUME OF THE ORIGINAL CHARGE REMAINS, AND DRAWING OFF THE REMAINING MATERIAL AS THE PITCH PRODUCT WITH A CONTENT NOT BELOW 8% OF HYDROCARBONS INSOLUBLE IN NITROBENZENE AND A CONTENT NOT BELOW ABOUT 20% OF HYDROCARBONS SOLUBLE IN NITROBENZENE BUT INSOLUBLE IN ACETONE.
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |