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US2810424A
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Method and apparatus for making reinforced plastic tubing
Assignee: Aetna Standard Engineering Co
•
Filing: 1953-03-20
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Granted: 1957-10-22
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Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Swartswelter
- 👤 Gilbert V Kullgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:34
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29C48/16; B29C48/18; B29C48/21; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/081; F16L11/085; Y; Y10; Y10S; Y10S138/00; Y10S138/07
Claims Analysis
Total Claims: 0
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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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |