US2703487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking hollow building block
Assignee: Individual
•
Filing: 1950-09-28
•
Granted: 1955-03-08
•
Expires: 1970-09-28
Abstract
No abstract record available.
Inventors
- 👤 Ossoinack Andrea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:21
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/28; E04B2/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US474285A
Cited
US699587A
Cited
US1009469A
Cited
US1182980A
Cited
US1369115A
Cited
US1415197A
Cited
US1681631A
Cited
US2321403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |