US3329751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding using a material yielding an inert atmosphere in mold
Assignee: Phillips Petroleum Co
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Filing: 1966-06-10
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Granted: 1967-07-04
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Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert P Slicker
- 👤 Jr Edward C Held
- 👤 James L Rakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A ROTATIONAL MOLDING METHOD, THE STEPS COMPRISING: (A) PROVIDING IN A MOLD BOTH SOLID POWDERED THERMOPLASTIC AND AT LEAST ONE PIECE OF SOLID CARBON DIOXIDE; (B) RENDERING SAID THERMOPLASTIC MATERIAL INTO A MOLDABLE STATE BY HEATING THE SAME; (C) SUBSTANTIALLY SIMULTANEOUSLY CONVERTING SAID CARBON DIOXIDE PARTICLE FROM A SOLID TO A GASEOUS STATE; (D) THE SOLID CARBON DIOXIDE BEING PLACED INTO SAID MOLD IN A MANNER AND AMOUNT SUFFICIENT TO FORM IN SAID MOLD A PROTECTIVE ATMOSPHERE IN SAID MOLD AS IT CONTAINS SAID SOLID POWDERED THERMOPLASTIC AND AS SAID THERMOPLASTIC IS SUBJECTED TO HEAT IN SAID MOLD SO AS TO PROTECT SAID THERMOPLASTIC AGAINST DEGRADATION.
Claim 2
Dependent Claim
107 words
IN A ROTATIONAL MOLDING METHOD, THE STEPS COMPRISING: (A) PROVIDING IN A MOLD BOTH SOLID POWDERED THERMOPLASTIC AND AT LEAST ONE PIECE OF SOLID CARBON DIOXIDE; (B) RENDERING SAID THERMOPLASTIC MATERIAL INTO A MOLDABLE STATE BY HEATING THE SAME; (C) SUBSTANTIALLY SIMULTANEOUSLY CONVERTING SAID CARBON DIOXIDE PARTICLE FROM A SOLID TO A GASEOUS STATE; (D) THE SOLID CARBON DIOXIDE BEING PLACED INTO SAID MOLD IN A MANNER AND AMOUNT SUFFICIENT TO FORM IN SAID MOLD A PROTECTIVE ATMOSPHERE IN SAID MOLD AS IT CONTAINS SAID SOLID POWDERED THERMOPLASTIC AND AS SAID THERMOPLASTIC IS SUBJECTED TO HEAT IN SAID MOLD SO AS TO PROTECT SAID THERMOPLASTIC AGAINST DEGRADATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |