Patent DE935391C successfully refreshed from Google Patents.
US2787024A
Expired / Lapsed
US
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Method of making plastic covered golf balls
Assignee: Worthington Ball Co
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Filing: 1953-06-11
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Granted: 1957-04-02
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Expires: 1973-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:04
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/22; B29C70/00; B29C70/68; B29C70/70; B29L; B29L2031/00; B29L2031/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
THE METHOD OF MAKING AN ARTICLE OF MANUFACTURE OF POLYETHYLENE PLASTIC MATERIAL INCLUDING THE STEPS OF HEATING POLYETHYLENE PLASTIC MATERIAL TO ABOVE 475* F. AND INJECTION MOLDING THE SAME UNDER HIGH PRESSURE TO SELECTED BLANK SHAPE, THEN PLACING SAID BLANK SHAPE IN A DIE CAVITY AND REMOLDING THE SAME TAT A LOWER TEMPERATURE OF FROM 305* F. TO 310* F. FOR FROM 2 3/4 MINUTES AT LOW PRESSURE, AND THEN INCREASING THE PRESSURE AND REDUCING THE MOLD TEMPERATURE TO SET THE REMOLDED PLASTIC MATERIAL.
References Cited (Backward Citations)
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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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |