Patent US2558220A successfully refreshed from Google Patents.
US2558220A
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Assignee: Dominion Bridge Co Ltd
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Filing: 1946-06-08
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Granted: 1951-06-26
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Expires: 1966-06-08
Abstract
No abstract record available.
Inventors
- 👤 Mclachlan Robert Angus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:22
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/16; F16J13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US775768A
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US812728A
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US1257301A
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US1421721A
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US1215682A
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US1215418A
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US1385389A
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US1488801A
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US1921415A
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US2457625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |