Patent US5513475A successfully refreshed from Google Patents.
US5513475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-faceted interfacial building blocks
Assignee: Individual
•
Filing: 1994-05-18
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Granted: 1996-05-07
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Expires: 2014-05-18
Abstract
Abstract Novel building blocks are used to build inexpensive, decorative walls and building, and the like. The blocks are multi-faceted such that all of the outside faces of the blocks will match each of the faces of other blocks and allow the construction of walls having unique decorative effects, while overcoming the problems associated with standard rectangular building blocks.
Inventors
- 👤 Cecil F. Schaaf
- 👤 Craig R. Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:53
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/39; E04C1/395; E04B; E04B2/00; E04B2/02; E04B2002/0256; E04B2002/0263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A multi-faceted building block, said block having a vertical axis and a horizontal axis, said horizontal axis being longer than said vertical axis; said building block providing a flat upper surface, flat bottom surface, two identical flat end surfaces and at least four side surfaces; said block having a small, vertical, centered first opening through it; said block having a cavity adjacent one side of the small, vertical, centered first opening; each said side surface and flat end surface having a vertical channel therein; each said flat end surface having a semi-cavity therein, adjacent the vertical channel therein; said block having therethrough, two large second openings near each flat end, each large second opening situated essentially equidistant from each flat end.
Claim 2
Dependent Claim
121 words
A multi-faceted building block, said block having a vertical axis and a horizontal axis, said horizontal axis being longer than said vertical axis; said building block providing a flat upper surface, flat bottom surface, two identical flat end surfaces and at least four side surfaces; said block having a small, vertical, centered first opening through it; said block having a cavity adjacent one side of the small, vertical, centered first opening; each said side surface and flat end surface having a vertical channel therein; each said flat end surface having a semi-cavity therein, adjacent the vertical channel therein; said block having therethrough, two large second openings near each flat end, each large second opening situated essentially equidistant from each flat end.
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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) | 1999-05-07 | 1999-11-06 | 2000-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-07 | 2003-11-06 | 2004-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-07 | 2007-11-06 | 2008-05-07 | $7700.00 | Window Closed / Lapsed |