Patent US2836581A successfully refreshed from Google Patents.
US2836581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making resins
Assignee: American Oil Co
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Filing: 1955-03-01
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Granted: 1958-05-27
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Expires: 1975-03-01
Abstract
No abstract record available.
Inventors
- 👤 Leon B Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR MAKING A RESIN FROM A FRACTION OF DRIPOLENE WHICH BOILS WITHIN THE RANGE OF ABOUT 200* TO 400*F., SAID DRIPOLENE CONSISTING OF THE NORMALLY LIQUID MIXTURE OF HYDROCARBON OBTAINED IN THE PYROLYSIS OF A NORMALLY GASEOUS HYDROCARBON HAVING AT LEAST TWO CARBON ATOMS IN THE MOLECULE AT A TEMPERATURE BETWEEN ABOUT 1200* AND 1800*F. AND A CONTACT TIME BETWEEN ABOUT 0.05 AND 5 SECONDS, THERMALLY POLYMERIZING SAID DRIPOLENE FRACTION AT A TEMPERATURE BETWEEN ABOUT 400* AND 500*F. WHEREBY A PORTION OF SAID DRIPOLENE FRACTION IS CONVERTED INTO A THERMAL RESIN, CONTACTING SAID THERMAL RESIN WHILE DISSOLVED IN A HYDROCARBON SOLVENT WITH BETWEEN ABOUT 0.01 AND 0.2% BY WEIGHT OF BF3 AT A TEMPERATURE ABOVE ABOUT 300*F. BUT NOT HIGHER THAN ABOUT 600*F. AND REMOVING LOW-BOILING COMPONENTS FROM THE REACTION PRODUCTS WHEREBY AN IMPROVED RESIN IS OBTAINED.
Claim 2
Dependent Claim
139 words
A PROCESS FOR MAKING A RESIN FROM A FRACTION OF DRIPOLENE WHICH BOILS WITHIN THE RANGE OF ABOUT 200* TO 400*F., SAID DRIPOLENE CONSISTING OF THE NORMALLY LIQUID MIXTURE OF HYDROCARBON OBTAINED IN THE PYROLYSIS OF A NORMALLY GASEOUS HYDROCARBON HAVING AT LEAST TWO CARBON ATOMS IN THE MOLECULE AT A TEMPERATURE BETWEEN ABOUT 1200* AND 1800*F. AND A CONTACT TIME BETWEEN ABOUT 0.05 AND 5 SECONDS, THERMALLY POLYMERIZING SAID DRIPOLENE FRACTION AT A TEMPERATURE BETWEEN ABOUT 400* AND 500*F. WHEREBY A PORTION OF SAID DRIPOLENE FRACTION IS CONVERTED INTO A THERMAL RESIN, CONTACTING SAID THERMAL RESIN WHILE DISSOLVED IN A HYDROCARBON SOLVENT WITH BETWEEN ABOUT 0.01 AND 0.2% BY WEIGHT OF BF3 AT A TEMPERATURE ABOVE ABOUT 300*F. BUT NOT HIGHER THAN ABOUT 600*F. AND REMOVING LOW-BOILING COMPONENTS FROM THE REACTION PRODUCTS WHEREBY AN IMPROVED RESIN IS OBTAINED.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |