Patent US3430697A successfully refreshed from Google Patents.
US3430697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe casing side connector
Assignee: Individual
•
Filing: 1965-08-16
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Granted: 1969-03-04
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 William Wellstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:34
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2530253A
Cited
US2623467A
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US2689611A
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US2771955A
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US2949961A
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US3136362A
Cited
US2998847A
Cited
US3183973A
Cited
US3270818A
Cited
US3304105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |