US2136474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy lining for tubular parts
Assignee: AO Smith Corp
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Filing: 1936-05-15
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Granted: 1938-11-15
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Expires: 1956-05-15
Abstract
No abstract record available.
Inventors
- 👤 Straty Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:03
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/02; F17C1/04; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0612; F17C2203/0614; F17C2203/0619; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0648; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0305; F17C2209/00; F17C2209/22; F17C2209/221; F17C2209/23; F17C2209/234; F17C2260/00; F17C2260/03; F17C2260/035; F17C2260/036; F17C2260/05; F17C2260/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-11-14 | 1942-05-16 | 1942-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-14 | 1946-05-16 | 1946-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-14 | 1950-05-16 | 1950-11-15 | $7700.00 | Window Closed / Lapsed |