Patent US2392552A successfully refreshed from Google Patents.
US2392552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow building block
Assignee: Individual
•
Filing: 1943-05-10
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Granted: 1946-01-08
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Expires: 1963-05-10
Abstract
No abstract record available.
Inventors
- 👤 Roe James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/16; E04B2/18; E04B2002/0202; E04B2002/0204; E04B2002/0215; E04B2002/0217; E04B2002/0295
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) | 1949-01-07 | 1949-07-09 | 1950-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-01-07 | 1953-07-09 | 1954-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-01-07 | 1957-07-09 | 1958-01-08 | $7700.00 | Window Closed / Lapsed |