US2675695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite structure of metal and concrete
Assignee: —
•
Filing: —
•
Granted: 1954-04-20
•
Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US9172A
Cited
US273922A
Cited
US1000088A
Cited
GB117344A
Cited
US1594505A
Cited
GB464361A
Cited
US2101538A
Cited
US2382139A
Cited
US2378584A
Cited
US2449276A
Cited
US2510958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |