Patent US2729313A successfully refreshed from Google Patents.
US2729313A
Expired / Lapsed
US
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Bolted metal silo construction
Assignee: AO Smith Corp
•
Filing: 1949-08-10
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Granted: 1956-01-03
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Expires: 1969-08-10
Abstract
No abstract record available.
Inventors
- 👤 Adolph W Ernestus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:30
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/08; Y; Y10; Y10S; Y10S411/00; Y10S411/914; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |