Patent US3249672A successfully refreshed from Google Patents.
US3249672A
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Method of forming molds for blown plastic articles
Assignee: OI Glass Inc
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Filing: 1963-03-21
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Granted: 1966-05-03
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Richards
- 👤 Owen M Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0078; B29C37/0082; B29C33/00; B29C33/02; B29C33/04; B29C33/44; B29C33/52; B29C33/56; B29C49/00; B29C49/42; B29C49/48; B29C49/4823; B29C70/00; B29C70/68; B29C70/78; B29L; B29L2031/00; B29L2031/757; Y; Y10; Y10S; Y10S425/00; Y10S425/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF FORMING MOLDS FOR BLOWN PLASTIC ARTICLES COMPRISING THE STEPS OF CASTING A METAL SHELL MOLD WITH INTEGRAL ANCHORING MEMBERS EXTENDING FROM THE BACK THEREOF, PLACING A SOLUBLE WAXY SUBSTANCE ON SELECTED PORTIONS OF THE BACK OF THE SHELL, PARTIALLY IMBEDDING ONE END OF EACH OF A PAIR OF TUBES IN THE WAXY SUBSTANCE AT SPACED APART POINTS, COVERING THE ENTIRE BACK OF SAID SHELL MOLD WITH AN EPOXY RESIN OF GREATER THICKNESS THAN THE LENGTH OF SAID ANCHORING MEMBERS, AND DISSOLVING THE WAXY SUBSTANCE FROM BETWEEN THE EPOXY AND SHELL WHEREBY AN EPOXY BACKED, SHELL MOLD IS FORMED HAVING COOLANT PASSAGES THEREIN.
Claim 2
Independent Claim
105 words
THE METHOD OF FORMING MOLDS FOR BLOWN PLASTIC ARTICLES COMPRISING THE STEPS OF CASTING A METAL SHELL MOLD WITH INTEGRAL ANCHORING MEMBERS EXTENDING FROM THE BACK THEREOF, PLACING A SOLUBLE WAXY SUBSTANCE ON SELECTED PORTIONS OF THE BACK OF THE SHELL, PARTIALLY IMBEDDING ONE END OF EACH OF A PAIR OF TUBES IN THE WAXY SUBSTANCE AT SPACED APART POINTS, COVERING THE ENTIRE BACK OF SAID SHELL MOLD WITH AN EPOXY RESIN OF GREATER THICKNESS THAN THE LENGTH OF SAID ANCHORING MEMBERS, AND DISSOLVING THE WAXY SUBSTANCE FROM BETWEEN THE EPOXY AND SHELL WHEREBY AN EPOXY BACKED, SHELL MOLD IS FORMED HAVING COOLANT PASSAGES THEREIN.
References Cited (Backward Citations)
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US2790998A
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |