US2835659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene waxes and method of making
Assignee: Eastman Kodak Co
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Filing: 1957-02-11
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Granted: 1958-05-20
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Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 James E Guillet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; C08F6/00; C08F6/04; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
THE METHOD OF MAKING A SYNTHETIC WAX HAVING LOW MELT VISCOSITY IN COMBINATION WITH HIGH HARDNESS AND HIGH SOFTENIONG POINT WHICH COMPRISES HEATING, AT A TEMPERATURE OF 300-450*C., CRYSTALLINE POLYPROPYLENE HAVING A DENSITY OF AT LEAST 0.90 AND AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 20,000, UNTIL THE MOLECULAR WEIGHT IS REDUCED TO A VALUE WITHIN THE RANGE OF 1000-80009
Claim 2
Independent Claim
60 words
THE METHOD OF MAKING A SYNTHETIC WAX HAVING LOW MELT VISCOSITY IN COMBINATION WITH HIGH HARDNESS AND HIGH SOFTENIONG POINT WHICH COMPRISES HEATING, AT A TEMPERATURE OF 300-450*C., CRYSTALLINE POLYPROPYLENE HAVING A DENSITY OF AT LEAST 0.90 AND AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 20,000, UNTIL THE MOLECULAR WEIGHT IS REDUCED TO A VALUE WITHIN THE RANGE OF 1000-80009
Claim 3
Dependent Claim
73 words
A SYNTHETIC POLYPROPYLENE WAX WHICH IS READILY FLOWABLE IN MOLTEN FORM AND WHICH HAS AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 1000-8000, A DENSITY OF AT LEAST 0.90, AN ASTM D36-26 BALL AND RING SOFTENING POINT OF AT LEAST 130*C., AN ASTM D5-52 PENETRATION HARDNESS VALUE OF 0 TO 100 G. LOAD FOR 5 SECONDS AND BELOW 2. AT 250 G. LOAD FOR 5 SECONDS, AND AN ACID NUMBER OF SUBSTANTIALLY ZERO.
Claim 4
Dependent Claim
73 words
A SYNTHETIC POLYPROPYLENE WAX WHICH IS READILY FLOWABLE IN MOLTEN FORM AND WHICH HAS AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 1000-8000, A DENSITY OF AT LEAST 0.90, AN ASTM D36-26 BALL AND RING SOFTENING POINT OF AT LEAST 130*C., AN ASTM D5-52 PENETRATION HARDNESS VALUE OF 0 TO 100 G. LOAD FOR 5 SECONDS AND BELOW 2. AT 250 G. LOAD FOR 5 SECONDS, AND AN ACID NUMBER OF SUBSTANTIALLY ZERO.
References Cited (Backward Citations)
US2372001A
Cited
BE538782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |