US2804674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double head reinforcing rod for pre-stress concrete
Assignee: LONG CONSTRUCTION Co
•
Filing: 1952-06-16
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Granted: 1957-09-03
•
Expires: 1972-06-16
Abstract
No abstract record available.
Inventors
- 👤 Long Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:52
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/125; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR636650A
Cited
GB338864A
Cited
GB364621A
Cited
US1991256A
Cited
US2168990A
Cited
US2218099A
Cited
US2370174A
Cited
US2413990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |