US2893759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conically tapered screw-type casing joint with metal-to-metal seal
Assignee: AO Smith Corp
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Filing: 1957-05-06
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Granted: 1959-07-07
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Blose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/004; E; E21; E21B; E21B17/00; E21B17/02; E21B17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |