US3293341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of hollow-shaped structures
Assignee: Phillips Petroleum Co
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Filing: 1963-11-12
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Granted: 1966-12-20
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Paul J Boeke
- 👤 Robert J Martinovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD FOR PREPARING A HOLLOW STRUCTURE HAVING IMPROVED STIFFNESS COMPRISING MOLDING A POLYMER OF A MONO-1-OLEFIN BY USE OF A FLUID PRESSURE DIFFERENTIAL TO FROM A HOLLOW STRUCTURE, COOLING SUCH STRUCTURE TO BELOW ITS CRYSTALLINE FREEZE POINT, HEAT TREATING SAID STRUCTURE AT A TEMPRATURE OF 1 TO 50*F. BELOW ITS CRYSTALLINE FREEZE POINT FOR A PERIOD OF TIME SUFFICIENT TO INCREASE THE STRUCTURE''S RESISTANCE TO DEFORMATION, AND THEREAFTER COOLING SAID STRUCTURE.
Claim 2
Independent Claim
72 words
A METHOD FOR PREPARING A HOLLOW STRUCTURE HAVING IMPROVED STIFFNESS COMPRISING MOLDING A POLYMER OF A MONO-1-OLEFIN BY USE OF A FLUID PRESSURE DIFFERENTIAL TO FROM A HOLLOW STRUCTURE, COOLING SUCH STRUCTURE TO BELOW ITS CRYSTALLINE FREEZE POINT, HEAT TREATING SAID STRUCTURE AT A TEMPRATURE OF 1 TO 50*F. BELOW ITS CRYSTALLINE FREEZE POINT FOR A PERIOD OF TIME SUFFICIENT TO INCREASE THE STRUCTURE''S RESISTANCE TO DEFORMATION, AND THEREAFTER COOLING SAID STRUCTURE.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |