US3274313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a hollow elongated plastic article
Assignee: Union Carbide Corp
•
Filing: 1964-07-23
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Granted: 1966-09-20
•
Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry J Harp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0015; B29C49/0021; B29C43/00; B29C43/22; B29C43/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
A METHOD OF MAKING A HOLLOW ELONGATED ARTICLE OF A THIN WALL STRUCTURE FROM A BIAXIAL ORIENTATABLE PLASTIC MATERIAL COMPRISING THE STEPS OF EXTRUDING A HOLLOW TUBULAR MEMBER FROM SAID PLASTIC MATERIAL, DIRECTING SAID TUBULAR MEMBER TO A PASSAGE OF THE SIZE AND CONFIGURATION OF THE ARTICLE TO BE FORMED WHILE PASSING IT THROUGH A SPACE WHICH IS SUFFICIENT TO ALLOW LONGITUDINAL STRETCHING OF SAID TUBULAR MEMBER, MAINTAINING A LOW PRESSURE WITHIN SAID TUBULAR MEMBER WHICH IS JUST SUFFICIENT TO PREVENT ITS COLLAPSED AS IT IS BEING PASSED THROUGH SAID SPACE, STRETCHING SAID TUBULAR MEMBER IN THE LONGITUDINAL DIRECTION BY PULLING SAID TUBULAR MEMBER THROUGH SAID SPACE AT A GREATER LINEAR RATE OF SPEED THAN THAT AT WHICH IT IS EXTRUDED, PASSING SAID TUBULAR MEMBER INTO SAID PASSAGE WHILE MAINTAINING IT IN THE DEFORMABLE STATE, DRAWING SAID TUBULAR MEMBER AGAINST THE WALLS OF SAID PASSAGE BY APPLYING A VACUUM AROUND THE PERIPHERY AND ALONG THE LENGTH OF SAID TUBULAR MEMBER THEREBY RESHAPING IT IN THE TRANVERSE DIRECTION TO THE SIZE AND CONFIGURATION OF THE ARTICLE TO BE FORMED, AND COOLING SAID TUBULAR MEMBER AS IT IS BEING RESHAPED WITHIN SAID PASSAGE SO THAT SAID TUBULAR MEMBER ATTAINS A STATE OF RIGIDITY PRIOR TO EMERGENCE FROM SAID PASSAGE.
Claim 2
Independent Claim
207 words
A METHOD OF MAKING A HOLLOW ELONGATED ARTICLE OF A THIN WALL STRUCTURE FROM A BIAXIAL ORIENTATABLE PLASTIC MATERIAL COMPRISING THE STEPS OF EXTRUDING A HOLLOW TUBULAR MEMBER FROM SAID PLASTIC MATERIAL, DIRECTING SAID TUBULAR MEMBER TO A PASSAGE OF THE SIZE AND CONFIGURATION OF THE ARTICLE TO BE FORMED WHILE PASSING IT THROUGH A SPACE WHICH IS SUFFICIENT TO ALLOW LONGITUDINAL STRETCHING OF SAID TUBULAR MEMBER, MAINTAINING A LOW PRESSURE WITHIN SAID TUBULAR MEMBER WHICH IS JUST SUFFICIENT TO PREVENT ITS COLLAPSED AS IT IS BEING PASSED THROUGH SAID SPACE, STRETCHING SAID TUBULAR MEMBER IN THE LONGITUDINAL DIRECTION BY PULLING SAID TUBULAR MEMBER THROUGH SAID SPACE AT A GREATER LINEAR RATE OF SPEED THAN THAT AT WHICH IT IS EXTRUDED, PASSING SAID TUBULAR MEMBER INTO SAID PASSAGE WHILE MAINTAINING IT IN THE DEFORMABLE STATE, DRAWING SAID TUBULAR MEMBER AGAINST THE WALLS OF SAID PASSAGE BY APPLYING A VACUUM AROUND THE PERIPHERY AND ALONG THE LENGTH OF SAID TUBULAR MEMBER THEREBY RESHAPING IT IN THE TRANVERSE DIRECTION TO THE SIZE AND CONFIGURATION OF THE ARTICLE TO BE FORMED, AND COOLING SAID TUBULAR MEMBER AS IT IS BEING RESHAPED WITHIN SAID PASSAGE SO THAT SAID TUBULAR MEMBER ATTAINS A STATE OF RIGIDITY PRIOR TO EMERGENCE FROM SAID PASSAGE.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |