US2452640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof and wall structure
Assignee: Individual
•
Filing: 1946-05-01
•
Granted: 1948-11-02
•
Expires: 1966-05-01
Abstract
No abstract record available.
Inventors
- 👤 Elmendorf Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:52
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/38; E04C2/386; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6812; E04B2/00; E04B2/02; E04B2/14; E04C2/34; E04C2/36; E04B2002/0295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |