US3530523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline pig
Assignee: TD Williamson Inc
•
Filing: 1968-11-18
•
Granted: 1970-09-29
•
Expires: 1988-11-18
Abstract
No abstract record available.
Inventors
- 👤 Burton Ver Nooy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:27
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0554; F; F16; F16L; F16L2101/00; F16L2101/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1547440A
Cited
US2188959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |