US2435998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite prestressed concrete beam and slab structure
Assignee: PORETE Manufacturing Co
•
Filing: 1943-03-31
•
Granted: 1948-02-17
•
Expires: 1963-03-31
Abstract
No abstract record available.
Inventors
- 👤 Cueni Clement Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:47
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/06; E04C5/0645; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/26; E04B5/261; E04B5/263; E04C3/00; E04C3/02; E04C3/20; E04C3/26; E04B2005/232; E04B2005/237
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |