Patent US3493250A successfully refreshed from Google Patents.
US3493250A
Expired / Lapsed
US
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Coupling for thermoplastic tube
Assignee: Parker Hannifin Corp
•
Filing: 1967-12-18
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Granted: 1970-02-03
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Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 William A Hertel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:23
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/49945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152537A
Cited
US2252920A
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US2300464A
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US2328298A
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US2365747A
Cited
DE1092737B
Cited
US3008736A
Cited
US2821567A
Cited
US3332708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |