Patent US3530531A successfully refreshed from Google Patents.
Patent US1439737A successfully refreshed from Google Patents.
US1439737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reenforced concrete construction
Assignee: HOWARD M HOUGH
•
Filing: 1918-07-29
•
Granted: 1922-12-26
•
Expires: 1938-07-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:38
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-12-25 | 1926-06-26 | 1926-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-25 | 1930-06-26 | 1930-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-25 | 1934-06-26 | 1934-12-26 | $7700.00 | Window Closed / Lapsed |