US2981331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing tubing and for scraping matter from the inner wall thereof
Assignee: Individual
•
Filing: 1957-01-09
•
Granted: 1961-04-25
•
Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Bryant P Arterbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:33
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B47/00; E21B47/10; E21B47/117; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |