Patent US3502354A successfully refreshed from Google Patents.
US3502354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead pipe connector means
Assignee: Fluor Corp
•
Filing: 1968-07-03
•
Granted: 1970-03-24
•
Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B43/013; E21B41/00; E21B41/0007; F; F16; F16L; F16L37/00; F16L37/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB316168A
Cited
US1874918A
Cited
US1831956A
Cited
US2350017A
Cited
US2590688A
Cited
DE1042329B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |