US2844024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination preformed and cast-in-situ reinforced flooring structure
Assignee: Individual
•
Filing: 1954-10-21
•
Granted: 1958-07-22
•
Expires: 1974-10-21
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald James Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:16
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/29; E04B5/32; E04B5/36; E04B5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US739646A
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US809090A
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US1065119A
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GB274291A
Cited
US1778315A
Cited
US1986171A
Cited
US2230349A
Cited
US2271584A
Cited
US2465074A
Cited
DE822154C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |