US2834992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding of perfluorochlorocarbon plastics
Assignee: 3M Co
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Filing: 1954-07-28
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Granted: 1958-05-20
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Julius A Jupa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/72; B29C45/0001; B29C45/26; B29C45/27; B29C45/2737; B29C45/2738; B29C45/46; B29C45/58; B29C45/581
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PROCESS FOR THE INJECTION MOLDING OF A THERMOPLASTIC MATERIAL COMPRISING A POLYMER OF TRIFLUOROCHLOROETHYLENE HAVING AN N. S. T. BETWEEN ABOUT 200*C. AND ABOUT 350*C. AND A TRANSITION POINT OF ABOUT 200*C. AND WHICH SAID MATERIAL IS INJECTED FROM AN INJECTION CHAMBER THROUGH A CENTRAL MAIN-RUNNER AND FROM SAID MAIN-RUNNER THROUGH A PLURALITY OF FEED-RUNNERS EXTENDING INTO A
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR THE INJECTION MOLDING OF A THERMOPLASTIC MATERIAL COMPRISING A POLYMER OF TRIFLUOROCHLOROETHYLENE HAVING AN N. S. T. BETWEEN ABOUT 200*C. AND ABOUT 350*C. AND A TRANSITION POINT OF ABOUT 200*C. AND WHICH SAID MATERIAL IS INJECTED FROM AN INJECTION CHAMBER THROUGH A CENTRAL MAIN-RUNNER AND FROM SAID MAIN-RUNNER THROUGH A PLURALITY OF FEED-RUNNERS EXTENDING INTO A
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) | 1961-05-19 | 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 |