US3787552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming thinwalled tubular articles
Assignee: Alliance Rubber Co
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Filing: 1970-12-21
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Granted: 1974-01-22
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Expires: 1990-12-21
Abstract
Abstract Apparatus for producing thinwalled tubing of elastic material formed by a method including, die forming a mass of the elastic material into thinwalled tubing, supplying a pressurizing fluid and a non-adhesive material through a conduit to the interior of the tubing, and passing the tubing through a curing medium while venting the pressurizing fluid in the tubing through both of its extremities to maintain the tubing uniformly expanded and stabilized in the curing medium.
Inventors
- 👤 R Spencer
- 👤 W Penny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:26
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/88; B29C48/91; B29C35/041; B29C2035/042; B29K; B29K2021/00; B29L; B29L2023/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |