Patent US2627119A successfully refreshed from Google Patents.
US2764431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing-head adapter flange
Assignee: Shaffer Tool Works
•
Filing: 1952-12-05
•
Granted: 1956-09-25
•
Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Wilde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; F; F16; F16B; F16B2200/00; F16B2200/50; F16B2200/503; F16B2200/506
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US626223A
Cited
US750428A
Cited
GB189414892A
Cited
US696603A
Cited
US1020929A
Cited
US1179091A
Cited
US1389282A
Cited
US1456761A
Cited
US2412418A
Cited
US2461856A
Cited
US2558695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |