Patent US2737270A successfully refreshed from Google Patents.
US2737270A
Expired / Lapsed
US
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Beam
Assignee: Great Lakes Steel Corp
•
Filing: 1949-05-11
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Granted: 1956-03-06
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 William J Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:20
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; E04C3/07; E04C2003/0404; E04C2003/0408; E04C2003/0413; E04C2003/0426; E04C2003/0439; E04C2003/0443; E04C2003/0452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1253216A
Cited
US1229239A
Cited
US1900541A
Cited
US2091875A
Cited
US2141919A
Cited
US2457147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |