US2424080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural unit and cellular construction made therewith
Assignee: Individual
•
Filing: 1945-02-12
•
Granted: 1947-07-15
•
Expires: 1965-02-12
Abstract
No abstract record available.
Inventors
- 👤 Ernst F Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:00
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/10; E04B2/00; E04B2/02; E04B2/28; E04B2002/0297; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1013592A
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US1526462A
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US1900711A
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US1972570A
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US1974767A
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US2042797A
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US2177036A
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US2344749A
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US2366151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |