Patent US3217078A successfully refreshed from Google Patents.
US3217078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding hollow articles from thermoplastic materials
Assignee: C-R Custom Plastics Corp
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Filing: 1962-04-16
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Granted: 1965-11-09
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Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 Donald J Kleiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:45
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; B29C41/00; B29C41/02; B29C41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF MOLDING A SHAPED, SELF-SUPPORTING, RELATIVELY THICK-WALLED, HOLLOW ARTICLE FROM A FINELY DIVIDED THERMOPLASTIC MATERIAL HAVING A SHARP MELTING POINT WHICH COMPRISES HEATING THE COMPLEMENTARY SECTIONS OF A MOLD WHICH WHEN ASSEMBLED ENCLOSE SUBSTANTIALLY COMPLETELY A MOLDING CAVITY HAVING A SURFACE CORRESPONDING TO THE OUTER SURFACE OF THE ARTICLE TO BE MOLDED, ASSEMBLING THE SECTIONS OF SAID MOLD ENCLOSING THEREIN AN EXACT QUANTITY OF A FINELY DIVIDED SOLID THERMOPLASTIC MATERIAL REQUIRED TO PRODUCE SAID ARTICLE, THE HEATING OF SAID MOLD BEING CARRIED OUT TO A TEMPERATURE ABOVE THE MELTING POINT OF SAID THERMOPLASTIC MATERIAL TO INSURE THE COMPLETE FUSION
Claim 2
Independent Claim
101 words
THE METHOD OF MOLDING A SHAPED, SELF-SUPPORTING, RELATIVELY THICK-WALLED, HOLLOW ARTICLE FROM A FINELY DIVIDED THERMOPLASTIC MATERIAL HAVING A SHARP MELTING POINT WHICH COMPRISES HEATING THE COMPLEMENTARY SECTIONS OF A MOLD WHICH WHEN ASSEMBLED ENCLOSE SUBSTANTIALLY COMPLETELY A MOLDING CAVITY HAVING A SURFACE CORRESPONDING TO THE OUTER SURFACE OF THE ARTICLE TO BE MOLDED, ASSEMBLING THE SECTIONS OF SAID MOLD ENCLOSING THEREIN AN EXACT QUANTITY OF A FINELY DIVIDED SOLID THERMOPLASTIC MATERIAL REQUIRED TO PRODUCE SAID ARTICLE, THE HEATING OF SAID MOLD BEING CARRIED OUT TO A TEMPERATURE ABOVE THE MELTING POINT OF SAID THERMOPLASTIC MATERIAL TO INSURE THE COMPLETE FUSION
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |