US1996641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural frame
Assignee: DAHLSTROM METALLIC DOOR Co
•
Filing: 1931-08-08
•
Granted: 1935-04-02
•
Expires: 1951-08-08
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:33
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/24; E04B2/00; E04B2/72; E04B1/2403; E04B2001/2415; E04B2001/246; E04B2001/2463; E04B2001/2466; E04B2001/2472; E04B2001/2484; E04B2001/2496
Claims Analysis
Total Claims: 0
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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) | 1938-04-01 | 1938-10-01 | 1939-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-01 | 1942-10-01 | 1943-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-01 | 1946-10-01 | 1947-04-02 | $7700.00 | Window Closed / Lapsed |