Patent US2237308A successfully refreshed from Google Patents.
US2237308A
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Assignee: Chicago Bridge and Iron Co
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Filing: 1939-02-17
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Granted: 1941-04-08
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Expires: 1959-02-17
Abstract
No abstract record available.
Inventors
- 👤 Donald E Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:54
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/02; B65D88/06; B65D88/08; B65D90/00; F; F17; F17C; F17C1/00; F17C1/02; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/032; F17C2201/05; F17C2201/052; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0614; F17C2203/0617; F17C2203/0634; F17C2203/0636; F17C2221/00; F17C2221/03; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/0123; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/035; F17C2260/00; F17C2260/01; F17C2260/011; F17C2270/00; F17C2270/01; F17C2270/0134; F17C2270/0139
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) | 1944-04-07 | 1944-10-07 | 1945-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-07 | 1948-10-07 | 1949-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-07 | 1952-10-07 | 1953-04-08 | $7700.00 | Window Closed / Lapsed |