US3257689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tubing having plastic memory
Assignee: Dow Silicones Corp
•
Filing: 1964-11-02
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Granted: 1966-06-28
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Donald E Weyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/10; B29C49/00; B29C61/00; B29C61/06; B29C61/08; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A DEVICE FOR PORDUCING EXPANDED TUBING HAVING PLASTIC MEMORY COMPRISING: A MOLD PIPE HAVING AN INTERNAL DIAMETER SUBSTANTIALLY EQUAL TO THE DESIRED EXTERNAL DIAMETER OF THE EXPANDED TUBING, MEANS FOR EXPANDING SAID TUBING TO THE INTERNAL DIAMETER OF SAID MOLD PIPE BY HEATING SAID TUBING AND INTRODUCING AIR PRESSURE WITHIN THE TUBING, THEREBY CAUSING THE DESIRED EXPANSION, MEANS DISPOSED ALONG SUBSTANTIALLY THE ENTIRE LENGTH OF SAID MOLD PIPE FOR CONDUCTING ENTRAPPED GASES OUT OF THE AREA BETWEEN SAID MOLD PIPE AND SAID TUBING COMPRISING A WIRE RUNNING SUBSTANTIALLY THE LENGTH OF SAID MOLD PIPE.
Claim 2
Independent Claim
94 words
A DEVICE FOR PORDUCING EXPANDED TUBING HAVING PLASTIC MEMORY COMPRISING: A MOLD PIPE HAVING AN INTERNAL DIAMETER SUBSTANTIALLY EQUAL TO THE DESIRED EXTERNAL DIAMETER OF THE EXPANDED TUBING, MEANS FOR EXPANDING SAID TUBING TO THE INTERNAL DIAMETER OF SAID MOLD PIPE BY HEATING SAID TUBING AND INTRODUCING AIR PRESSURE WITHIN THE TUBING, THEREBY CAUSING THE DESIRED EXPANSION, MEANS DISPOSED ALONG SUBSTANTIALLY THE ENTIRE LENGTH OF SAID MOLD PIPE FOR CONDUCTING ENTRAPPED GASES OUT OF THE AREA BETWEEN SAID MOLD PIPE AND SAID TUBING COMPRISING A WIRE RUNNING SUBSTANTIALLY THE LENGTH OF SAID MOLD PIPE.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |