Patent US2803598A successfully refreshed from Google Patents.
US2803598A
Expired / Lapsed
US
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Gamma ray polymerization of unsaturated esters
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-10-16
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Granted: 1957-08-20
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Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 James F Black
- 👤 Jr William C Hollyday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:21
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C08; C08F; C08F2/00; C08F2/46; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F20/18; C08F22/00; C08F22/10; C08F22/12; C08F22/14; C10M2203/00; C10M2203/10; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/082; C10M2209/084; C10M2209/086; C10N; C10N2050/00; C10N2050/10; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF PRODUCING A POLYESTYER PRODUCT USEFUL IN LUBRICATING OILS WHICH COMPRISES EXPOSING MONOMERS OF UNSATURATED ORGANIC ESTERS, HAVING AN AVERAGE OF AT LEAST ABOUT 8 CARBON ATOMS PER CARBOXYL GROUP AND FORMED FROM ALIPHATIC CARBOXYLIC ACIDS HAVING 3 TO 20 CARBON ATOMS AND ALCOHOLS HAVING 1 TO 30 CARBON ATOMS, TO GAMMA RADIATION IN THE RANGE BETWEEN 1X104 AND 2X10 7 ROEMTGENS PER HOUR, FOR A TIME SUFFICIENT TO FORM A POLYESTER HAVING A MOLECULAR WEIGHT IN THE RANGE BETWEEN ABOUT 2,000 AND 5,000 STAUDINGER, THE IRRADIATION OF SAID MONOMERS BEING CARRIED OUT WITH THE MONOMERS DISSOLVED IN A SOLVENT SUBSTANTIALLY INERT TO SAID RADIATION, SAID SOLVENT BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 20 TO 80% BY WEIGHT, BASED ON THE WEIGHT OF THE TOTAL MIXTURE.
Claim 2
Independent Claim
129 words
THE METHOD OF PRODUCING A POLYESTYER PRODUCT USEFUL IN LUBRICATING OILS WHICH COMPRISES EXPOSING MONOMERS OF UNSATURATED ORGANIC ESTERS, HAVING AN AVERAGE OF AT LEAST ABOUT 8 CARBON ATOMS PER CARBOXYL GROUP AND FORMED FROM ALIPHATIC CARBOXYLIC ACIDS HAVING 3 TO 20 CARBON ATOMS AND ALCOHOLS HAVING 1 TO 30 CARBON ATOMS, TO GAMMA RADIATION IN THE RANGE BETWEEN 1X104 AND 2X10 7 ROEMTGENS PER HOUR, FOR A TIME SUFFICIENT TO FORM A POLYESTER HAVING A MOLECULAR WEIGHT IN THE RANGE BETWEEN ABOUT 2,000 AND 5,000 STAUDINGER, THE IRRADIATION OF SAID MONOMERS BEING CARRIED OUT WITH THE MONOMERS DISSOLVED IN A SOLVENT SUBSTANTIALLY INERT TO SAID RADIATION, SAID SOLVENT BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 20 TO 80% BY WEIGHT, BASED ON THE WEIGHT OF THE TOTAL MIXTURE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |