US3294883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of material distribution in molded plastic articles
Assignee: Primerica Inc
•
Filing: 1965-02-04
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Granted: 1966-12-27
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Expires: 1985-02-04
Abstract
No abstract record available.
Inventors
- 👤 Polka Eugen Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/06; B29C49/071; B29C49/42; B29C49/64; B29C49/6409; B29C49/6436; B29C49/76; B29C49/761; B29C2049/023; B29C2949/00; B29C2949/07; B29C2949/072; B29C2949/0724; B29C2949/0725; B29C2949/073; B29C2949/0733; B29C2949/076; B29C2949/0768; B29C2949/077; B29C2949/0772; B29C2949/0773; B29C2949/078; B29C2949/0781; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF FORMING A PLASTIC CONTAINER OF NONUNIFORM GEOMETRY, COMPRISING THE STEPS OF INJECTION MOLDING IN A CLOSED ANNULAR MOLD AN ELONGATED TUBULAR PARISON FROM A MASS OF HEAT-SOFTENED PLASTIC MATERIAL, SUBJECTING SAID PARISON WHILE IN A HOT AND PLIABLE CONDITION TO A THREE-DIMENSIONAL TEMPERATURE GRADIENT BY SIMULTANEOUSLY BRINGING INTO CLOSE PROXIMITY TO SELECTED LONGITUDINALLY SPACED PORTIONS OF THE PARSION SEPARATE HEAT TRANSFER MEDIA AT INDEPENDENTLY CONTROLLED THERMAL CONDITIONS, MAINTAINING SAID TEMPERATURE GRADIENT FOR A PREDETERMINED PERIOD OF TIME CALCULATED TO RENDER THE PLASTIC MATERIAL IN CERTAIN ONES OF SAID PORTIONS OF THE PARISON
Claim 2
Independent Claim
95 words
THE METHOD OF FORMING A PLASTIC CONTAINER OF NONUNIFORM GEOMETRY, COMPRISING THE STEPS OF INJECTION MOLDING IN A CLOSED ANNULAR MOLD AN ELONGATED TUBULAR PARISON FROM A MASS OF HEAT-SOFTENED PLASTIC MATERIAL, SUBJECTING SAID PARISON WHILE IN A HOT AND PLIABLE CONDITION TO A THREE-DIMENSIONAL TEMPERATURE GRADIENT BY SIMULTANEOUSLY BRINGING INTO CLOSE PROXIMITY TO SELECTED LONGITUDINALLY SPACED PORTIONS OF THE PARSION SEPARATE HEAT TRANSFER MEDIA AT INDEPENDENTLY CONTROLLED THERMAL CONDITIONS, MAINTAINING SAID TEMPERATURE GRADIENT FOR A PREDETERMINED PERIOD OF TIME CALCULATED TO RENDER THE PLASTIC MATERIAL IN CERTAIN ONES OF SAID PORTIONS OF THE PARISON
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |