US2448926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated double wall structure
Assignee: Individual
•
Filing: 1943-10-08
•
Granted: 1948-09-07
•
Expires: 1963-10-08
Abstract
No abstract record available.
Inventors
- 👤 Emmet G Stack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:26
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3205; E04B2001/327; E04B2001/3276; E04B2001/3288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1249011A
Cited
US1337745A
Cited
FR492722A
Cited
US1526278A
Cited
US2172093A
Cited
US2351209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |