Patent US2617151A successfully refreshed from Google Patents.
US2617151A
Expired / Lapsed
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Injection molding of polytrifluorochloroethylene
Assignee: MW Kellogg Co
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Filing: 1949-12-31
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Granted: 1952-11-11
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Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Louis C Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:09
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/0001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A PROCESS FOR THE INJECTION MOLDING OF A THERMOPLASTIC MATERIAL COMPRISING A TRIFLUOROCHLOROETHYLENE POLYMER HAVING A NO-STRENGTHTEMPERATURE BETWEEN ABOUT 420 AND ABOUT 660 DEGREES FAHRENHEIT, THE STEPS WHICH COMPRISE HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN ITS CONVERSION POINT AND ABOUT 550 DEGREES FAHRENHEIT IN AN INJECTION CHAMBER AND INJECTING SAID HEATED MATERIAL THROUGH A NOZZLE MAINTAINED AT A TEMPERATURE SUBSTANTIALLY ABOVE THE AVERAGE TEMPERATURE SUBSTANTIALLY ABOVE THE CHAMBER AND BELOW ABOUT 700 DEGREES FAHRENHEIT INTO A DIE MAINTAINED AT A TEMPERATURE MORE THAN ABOUT 25 DEGREES FAHRENHEIT BELOW THE CONVERSION POINT OF SAID MATERIAL.
Claim 2
Dependent Claim
96 words
IN A PROCESS FOR THE INJECTION MOLDING OF A THERMOPLASTIC MATERIAL COMPRISING A TRIFLUOROCHLOROETHYLENE POLYMER HAVING A NO-STRENGTHTEMPERATURE BETWEEN ABOUT 420 AND ABOUT 660 DEGREES FAHRENHEIT, THE STEPS WHICH COMPRISE HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN ITS CONVERSION POINT AND ABOUT 550 DEGREES FAHRENHEIT IN AN INJECTION CHAMBER AND INJECTING SAID HEATED MATERIAL THROUGH A NOZZLE MAINTAINED AT A TEMPERATURE SUBSTANTIALLY ABOVE THE AVERAGE TEMPERATURE SUBSTANTIALLY ABOVE THE CHAMBER AND BELOW ABOUT 700 DEGREES FAHRENHEIT INTO A DIE MAINTAINED AT A TEMPERATURE MORE THAN ABOUT 25 DEGREES FAHRENHEIT BELOW THE CONVERSION POINT OF SAID MATERIAL.
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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |