Patent US2306211A successfully refreshed from Google Patents.
US2616149A
Expired / Lapsed
US
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Method of molding in situ concrete arched structures
Assignee: Bowen Colthurst & Partners Ltd
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Filing: 1947-12-11
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Granted: 1952-11-04
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Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Waller James Hardress Warrenne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:10
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1097915A
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US1241945A
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US1841586A
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FR669990A
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GB382610A
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US2096629A
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US2129932A
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US2267912A
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US2326010A
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US2270229A
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US2469603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |