US2811985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe line stoppers
Assignee: Individual
•
Filing: 1953-11-06
•
Granted: 1957-11-05
•
Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jewell W Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:44
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/124; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1639; Y10T137/1654; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1828381A
Cited
GB333357A
Cited
US1860855A
Cited
US1946138A
Cited
US2171943A
Cited
US2389792A
Cited
US2493891A
Cited
US2425483A
Cited
US2448118A
Cited
US2532143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |