US2769332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed slab and shell construction
Assignee: Individual
•
Filing: 1950-12-18
•
Granted: 1956-11-06
•
Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Kepler Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:06
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/28; E04B2/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1051842A
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DE339639C
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GB184561A
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US1980397A
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US2101416A
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US2058285A
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US2105854A
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US2120838A
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US2208589A
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US2294051A
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US2340263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |