US2440009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe protector applying and installing apparatus
Assignee: Thermoid Co
•
Filing: 1940-10-18
•
Granted: 1948-04-20
•
Expires: 1960-10-18
Abstract
No abstract record available.
Inventors
- 👤 Adelbert M Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:35
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/12; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T29/53665
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US46464A
Cited
US181113A
Cited
US305962A
Cited
US1044617A
Cited
US1352722A
Cited
US1395140A
Cited
US1420507A
Cited
US1965876A
Cited
US1852613A
Cited
US2068107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |