Patent US2326099A successfully refreshed from Google Patents.
Patent US2472783A successfully refreshed from Google Patents.
Patent US2724441A successfully refreshed from Google Patents.
US2724441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing anchor
Assignee: Individual
•
Filing: 1954-01-27
•
Granted: 1955-11-22
•
Expires: 1974-01-27
Abstract
No abstract record available.
Inventors
- 👤 Homer R Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:27
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/04; E21B23/0411; E21B23/04115
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2658459A
Cited
US2546950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |