US2551216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silo
Assignee: AO Smith Corp
•
Filing: 1945-06-07
•
Granted: 1951-05-01
•
Expires: 1965-06-07
Abstract
No abstract record available.
Inventors
- 👤 Wesley G Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:52
CPC Classifications
A; A01; A01F; A01F25/00; A01F25/16; A01F25/20; A01F25/2018; B; B65; B65D; B65D88/00; B65D88/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US947130A
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US1275558A
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US1390341A
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US1641340A
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US1703782A
Cited
GB505231A
Cited
US2281407A
Cited
US2305423A
Cited
US2351853A
Cited
US2386052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |