US3537731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for a tubing joint
Assignee: Individual
•
Filing: 1969-05-23
•
Granted: 1970-11-03
•
Expires: 1989-05-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Reddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:28
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/04; F16L19/043; F16L19/046; F16L17/00; F16L17/06; F16L17/067; F16L19/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA569311A
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DE608557C
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US2131552A
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GB913421A
Cited
US3258279A
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US3315970A
Cited
CH456275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |