Patent US2781206A successfully refreshed from Google Patents.
US2781206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensated pipe collar
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1953-05-18
•
Granted: 1957-02-12
•
Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Ragland Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:28
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US318925A
Cited
US672955A
Cited
US1035063A
Cited
US1218895A
Cited
GB176050A
Cited
US1761709A
Cited
US1875708A
Cited
FR757506A
Cited
US2452057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |