Patent US3495626A successfully refreshed from Google Patents.
US3495626A
Expired / Lapsed
US
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Pipeline plugging apparatus and methods
Assignee: YUBOSCOPE Inc
•
Filing: 1967-10-18
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Granted: 1970-02-17
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Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Dave D Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:49
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/1283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2517626A
Cited
US2601248A
Cited
US3042116A
Cited
US3106735A
Cited
US3285290A
Cited
US3298399A
Cited
US3381714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |