US2425079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced concrete shell construction and method of manufacture therefor
Assignee: Individual
•
Filing: 1943-05-27
•
Granted: 1947-08-05
•
Expires: 1963-05-27
Abstract
No abstract record available.
Inventors
- 👤 Billig Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:54
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/102; B; B63; B63B; B63B3/00; B63B3/14; B63B3/62; B63B5/00; B63B5/14; B63B5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US791076A
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US903909A
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GB228123A
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GB338864A
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US2080074A
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US1940402A
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US1955716A
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US2047197A
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US2234663A
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US2298376A
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US2301760A
Cited
US2315894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |