US3391507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building block for wall construction
Assignee: DORIS D DOWNING
•
Filing: 1963-12-03
•
Granted: 1968-07-09
•
Expires: 1983-12-03
Abstract
No abstract record available.
Inventors
- 👤 Doris D Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:15
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/39; E04C1/397; E04C1/40; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/0267
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A BUILDING BLOCK COMPRISING: A SUBSTANTIALLY RECTANGULAR BODY HAVING A PAIR OF PARALLEL END FACES, A TOP FACE, A BOTTOM FACE, AN OUTER FACE AND INNER FACE; AT LEAST ONE CONDUIT EXTENDING THROUGH SAID BODY SUBSTANTIALLY PERPENDICULAR TO SAID END FACES; SAID CONDUIT BEING TAPERED DOWN FROM EACH END TO A MINIMUM DIAMETER BETWEEN THE END FACES, SAID CONDUIT FURTHER HAVING ENLARGED CONSTANT DIAMETER PORTIONS ADJACENT EACH END FACE; AND A PLURALITY OF BORES EXTENDING PERPENDICULARLY THROUGH SAID TOP FACE, ONE-HALF OF SAID BORES EXTENDING COMPLETELY THROUGH THE BODY OF SAID BLOCK AND THROUGH SAID BOTTOM FACE TO FORM LONG BORES AND ONE-HALF OF SAID BORES EXTENDING ONLY PART WAY DOWN TO SAID BOTTOM FACE TO FORM SHORT BORES.
Claim 2
Dependent Claim
119 words
A BUILDING BLOCK COMPRISING: A SUBSTANTIALLY RECTANGULAR BODY HAVING A PAIR OF PARALLEL END FACES, A TOP FACE, A BOTTOM FACE, AN OUTER FACE AND INNER FACE; AT LEAST ONE CONDUIT EXTENDING THROUGH SAID BODY SUBSTANTIALLY PERPENDICULAR TO SAID END FACES; SAID CONDUIT BEING TAPERED DOWN FROM EACH END TO A MINIMUM DIAMETER BETWEEN THE END FACES, SAID CONDUIT FURTHER HAVING ENLARGED CONSTANT DIAMETER PORTIONS ADJACENT EACH END FACE; AND A PLURALITY OF BORES EXTENDING PERPENDICULARLY THROUGH SAID TOP FACE, ONE-HALF OF SAID BORES EXTENDING COMPLETELY THROUGH THE BODY OF SAID BLOCK AND THROUGH SAID BOTTOM FACE TO FORM LONG BORES AND ONE-HALF OF SAID BORES EXTENDING ONLY PART WAY DOWN TO SAID BOTTOM FACE TO FORM SHORT BORES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |