Patent US3278665A successfully refreshed from Google Patents.
US3278665A
Expired / Lapsed
US
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Method for forming hollow plastic articles
Assignee: Phillips Petroleum Co
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Filing: 1963-01-03
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Granted: 1966-10-11
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Expires: 1983-01-03
Abstract
No abstract record available.
Inventors
- 👤 Roy C Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:08
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/4242; B29C49/4247; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF FORMING HOLLOW PARTICLES HAVING A UNIFORM WALL THICKNESS FROM MOLTEN THERMOPLASTIC, WHICH COMPRISES THE STEPS OF EXTRUDING A TUBING OF SAID THERMOOXIDE WHEN HEATED IN PASSING THROUGH AN OXY-HYDROSAID TUBING IN A MOLD TO FORM A SINGLE-WALLED EXPANDED ARTICLE HAVING AN OPENING THEREIN; INSERTING THROUGH SAID OPENING MEANS FOR MECHANICALLY WORKING THE WALL OF THE PARTIALLY EXPANDED ARTICLE; SIMULTANEOUSLY MECHANICALLY WORKING AND FURTHER EXPANDING THE INNER WALL OF HE PARTIALLY EXPANDED TUBING THEREBY CAUSING IT TO EXPAND INTO CONTACT WITH THE WALLS OF THE SAID MOLD AND REMOVING THE RESULTING EXPANDED ARTICLE FROM SAID MOLD.
Claim 2
Independent Claim
98 words
THE METHOD OF FORMING HOLLOW PARTICLES HAVING A UNIFORM WALL THICKNESS FROM MOLTEN THERMOPLASTIC, WHICH COMPRISES THE STEPS OF EXTRUDING A TUBING OF SAID THERMOOXIDE WHEN HEATED IN PASSING THROUGH AN OXY-HYDROSAID TUBING IN A MOLD TO FORM A SINGLE-WALLED EXPANDED ARTICLE HAVING AN OPENING THEREIN; INSERTING THROUGH SAID OPENING MEANS FOR MECHANICALLY WORKING THE WALL OF THE PARTIALLY EXPANDED ARTICLE; SIMULTANEOUSLY MECHANICALLY WORKING AND FURTHER EXPANDING THE INNER WALL OF HE PARTIALLY EXPANDED TUBING THEREBY CAUSING IT TO EXPAND INTO CONTACT WITH THE WALLS OF THE SAID MOLD AND REMOVING THE RESULTING EXPANDED ARTICLE FROM SAID MOLD.
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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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |