Patent US3342912A successfully refreshed from Google Patents.
US3342912A
Expired / Lapsed
US
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Method of molding plastic containers
Assignee: Dow Chemical Co
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Filing: 1964-03-06
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Granted: 1967-09-19
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 William Z Northrup
- 👤 D Rugama Jose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:23
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/42; B29C43/34; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C2043/345; B29C2043/3455; B29C43/361; B29C2043/3615; B29C2043/3621; B29C2043/3623; B29C44/3415; B29C44/3426; B29K; B29K2105/00; B29K2105/04; B29K2105/25; B29K2105/251; B29L; B29L2031/00; B29L2031/712
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR FABRICATING CUPS FROM PARTIALLY PREEXPANDED THERMOPLASTIC MATERIAL AND EMPLOYING A VERIABLE VOLUME MOLD CAVITY INCLUDING A FEMALE MOLD, A MALE MOLD POSITIONABLE IN THE FEMALE TO FORM A CUP MOLD CAVITY, A LOADING TUBE PROJECTIBLE WITHING THE FEMALE MOLD, A LOADING CONE ENCLOSING THE LOWER END OF SAID LOADING TUBE AND ENGAGEABLE WITH THE TOP OF THE MALE MOLD, SAID LOADING TUBE CONTAINING PRE-EXPANDED THERMOPLASTIC MATERIAL SUFFICIENT FOR THE FORMATION OF A CUP, AND A MOLDING HEAD, COMPRISING THE STEPS OF MOVING THE MALE MOLD INTO THE FEMALE MOLD, PROJECTING THE LOADING TUBE WHILE THE LOADING CONE BLOCKS THE LOWER END THEREOF PARTIALLY INTO THE FEMALE MOLD TO ENGAGE THE LOADING CONE WITH THE TOP
Claim 2
Independent Claim
118 words
A METHOD FOR FABRICATING CUPS FROM PARTIALLY PREEXPANDED THERMOPLASTIC MATERIAL AND EMPLOYING A VERIABLE VOLUME MOLD CAVITY INCLUDING A FEMALE MOLD, A MALE MOLD POSITIONABLE IN THE FEMALE TO FORM A CUP MOLD CAVITY, A LOADING TUBE PROJECTIBLE WITHING THE FEMALE MOLD, A LOADING CONE ENCLOSING THE LOWER END OF SAID LOADING TUBE AND ENGAGEABLE WITH THE TOP OF THE MALE MOLD, SAID LOADING TUBE CONTAINING PRE-EXPANDED THERMOPLASTIC MATERIAL SUFFICIENT FOR THE FORMATION OF A CUP, AND A MOLDING HEAD, COMPRISING THE STEPS OF MOVING THE MALE MOLD INTO THE FEMALE MOLD, PROJECTING THE LOADING TUBE WHILE THE LOADING CONE BLOCKS THE LOWER END THEREOF PARTIALLY INTO THE FEMALE MOLD TO ENGAGE THE LOADING CONE WITH THE TOP
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |