US3223762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of thin-wall tubing
Assignee: FMC Corp
•
Filing: 1962-10-10
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Granted: 1965-12-14
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Horace P Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:59
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/001; B29C48/0018; B29C48/0019; B29C48/25; B29C48/355
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF FORMING A THIN-WALLED TUBING INCLUDING THE STEPS OF EXTRUDING A FLOWABLE FILM-FORMING MATERIAL THROUGH AN ANNULAR DIE IN THE FORM OF A TUBING HAVING LONGITUDINALLY EXTENDING ELEMENTS WHICH DIFFER IN THICKNESS, MAINTAINING THE TUBING IN AN EXPANDED CONDITION AS IT IS EXTRUDED, SOLIDIFYING THE FILM-FORMING MATERIAL OF THE EXPANDED TUBING, COLLAPSING THE TUBING INTO A FLATTENED CONDITION, AND ROTATING THE EXPANDED PORTION OF THE TUBING ABOUT ITS LONGITUDINAL AXIS AND RELATIVE TO THE FLATTENED PORTION THEREOF AT INTERMITTENT INTERVALS AND FROM AN APPROXIMATELY NEUTRAL POSITION DURING THE COLLAPSING THEREOF WHEREBY THE LONGITUDINAL JFOLD LINES OF THE FLATTENED TUBING OCCUR ON DIFFERENT LONGITUDINAL ELEMENTS OF THE TUBING.
Claim 2
Independent Claim
109 words
A METHOD OF FORMING A THIN-WALLED TUBING INCLUDING THE STEPS OF EXTRUDING A FLOWABLE FILM-FORMING MATERIAL THROUGH AN ANNULAR DIE IN THE FORM OF A TUBING HAVING LONGITUDINALLY EXTENDING ELEMENTS WHICH DIFFER IN THICKNESS, MAINTAINING THE TUBING IN AN EXPANDED CONDITION AS IT IS EXTRUDED, SOLIDIFYING THE FILM-FORMING MATERIAL OF THE EXPANDED TUBING, COLLAPSING THE TUBING INTO A FLATTENED CONDITION, AND ROTATING THE EXPANDED PORTION OF THE TUBING ABOUT ITS LONGITUDINAL AXIS AND RELATIVE TO THE FLATTENED PORTION THEREOF AT INTERMITTENT INTERVALS AND FROM AN APPROXIMATELY NEUTRAL POSITION DURING THE COLLAPSING THEREOF WHEREBY THE LONGITUDINAL JFOLD LINES OF THE FLATTENED TUBING OCCUR ON DIFFERENT LONGITUDINAL ELEMENTS OF THE TUBING.
References Cited (Backward Citations)
CA571392A
Cited
US2291238A
Cited
US2607078A
Cited
US2697852A
Cited
US2844846A
Cited
AT221794B
Cited
US3068517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |