US3236929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding
Assignee: Celanese Corp
•
Filing: 1961-08-09
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Granted: 1966-02-22
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Julius A Jupa
- 👤 Francis J Rielly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:57
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/16; B29C; B29C45/00; B29C45/0001; C; C08; C08J; C08J3/00; C08J3/20; C08J3/203; C08J2359/00; C08J2359/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE INJECTION MOLDING OF OXYMETHYLENE COPOLYMERS WHEREIN PELLETS OF A COPOLYMER HAVING SUCCESSIVELY RECURRING OXYMETHYLENE GROUPS AND HAVING OXYALKYLENE GROUPS WITH ADJACENT CARBON ATOMS ARE HEATED IN A PREHEATING ZONE TO THE PLASTIC STATE AND THEREAFTER FORCED THROUGH A NOZZLE INTO A CLOSED MOLD, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID PELLETS A SURFACE LAYER OF A WATER-INSOLUBLE SOAP.
Claim 2
Dependent Claim
60 words
IN THE INJECTION MOLDING OF OXYMETHYLENE COPOLYMERS WHEREIN PELLETS OF A COPOLYMER HAVING SUCCESSIVELY RECURRING OXYMETHYLENE GROUPS AND HAVING OXYALKYLENE GROUPS WITH ADJACENT CARBON ATOMS ARE HEATED IN A PREHEATING ZONE TO THE PLASTIC STATE AND THEREAFTER FORCED THROUGH A NOZZLE INTO A CLOSED MOLD, THE IMPROVEMENT WHICH COMPRISES APPLYING TO SAID PELLETS A SURFACE LAYER OF A WATER-INSOLUBLE SOAP.
References Cited (Backward Citations)
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US2217163A
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US2532245A
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |