US2801229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing glycidyl polyethers
Assignee: Shell Development Co
•
Filing: 1953-07-29
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Granted: 1957-07-30
•
Expires: 1973-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hoff Ronald L De
- 👤 Harvey L Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR PRODUCING A FUSIBLE RESINIFIED PRODUCT WHICH COMPRISES THE STEPS OF MIXING FREE META-PHENULENE DIAMINE WITH GLYCIDLY POLYETHER OF A POLYHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 IN AMOUNT OF ABOUT 0.12 TO 0.75 MOL OF THE DIAMINE PER EPOXIDE EQUIVALENT WEIGHT OF THE POLYETHER, REACTING THE MIXTURE BY HEATING AT ABOUT 50*C. TO 280*C. UNTIL A FUSIBLE RESINIFIED PRODUCT IS FORMED, AND THEN ARRESTING THE CURING OF THE PRODUCT BEFORE IT COMES INFUSIBLE BY COOLING TO A TEMPERATURE BELOW ABOUT 40*C.
Claim 2
Dependent Claim
86 words
A PROCESS FOR PRODUCING A FUSIBLE RESINIFIED PRODUCT WHICH COMPRISES THE STEPS OF MIXING FREE META-PHENULENE DIAMINE WITH GLYCIDLY POLYETHER OF A POLYHYDRIC PHENOL HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1.0 IN AMOUNT OF ABOUT 0.12 TO 0.75 MOL OF THE DIAMINE PER EPOXIDE EQUIVALENT WEIGHT OF THE POLYETHER, REACTING THE MIXTURE BY HEATING AT ABOUT 50*C. TO 280*C. UNTIL A FUSIBLE RESINIFIED PRODUCT IS FORMED, AND THEN ARRESTING THE CURING OF THE PRODUCT BEFORE IT COMES INFUSIBLE BY COOLING TO A TEMPERATURE BELOW ABOUT 40*C.
References Cited (Backward Citations)
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Cited
US2637716A
Cited
US2717885A
Cited
US2651589A
Cited
US2709664A
Cited
US2723241A
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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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |