US2687034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking building unit and hollow wall construction
Assignee: Individual
•
Filing: 1950-08-08
•
Granted: 1954-08-24
•
Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 Blanc Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:04
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/16; E04B2/18; E04B2002/0202; E04B2002/0204; E04B2002/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US764313A
Cited
US979913A
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US1171191A
Cited
GB143749A
Cited
US1884319A
Cited
US2025529A
Cited
US2138015A
Cited
CH195580A
Cited
US2520912A
Cited
GB577052A
Cited
US2512550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |