Patent JPS5587490A successfully refreshed from Google Patents.
US2982360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of steel oil and/or gas well tubing
Assignee: Huntington Alloys Corp
•
Filing: 1956-10-12
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Granted: 1961-05-02
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Byron B Morton
- 👤 Rice Rutledge St John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
E; E21; E21B; E21B17/00; Y; Y10; Y10S; Y10S166/00; Y10S166/902; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |