Patent US1979301A successfully refreshed from Google Patents.
US2114902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural steel framing
Assignee: WILLIAM P WITHEROW
•
Filing: 1934-10-17
•
Granted: 1938-04-19
•
Expires: 1954-10-17
Abstract
No abstract record available.
Inventors
- 👤 Henderson Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:32
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2415; E04B2001/2448; E04B2001/2457; E04B2001/2463; E04B2001/2466; E04B2001/2469
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) | 1941-04-18 | 1941-10-18 | 1942-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-18 | 1945-10-18 | 1946-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-18 | 1949-10-18 | 1950-04-19 | $7700.00 | Window Closed / Lapsed |