US2494748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: AO Smith Corp
•
Filing: 1946-02-16
•
Granted: 1950-01-17
•
Expires: 1966-02-16
Abstract
No abstract record available.
Inventors
- 👤 Adolph W Ernestus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F2200/00; F02F2200/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191128593A
Cited
US1407202A
Cited
US1494483A
Cited
US1584265A
Cited
US1678957A
Cited
US1831583A
Cited
GB325194A
Cited
GB358958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |