US5513475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-faceted interfacial building blocks
Assignee: Individual
•
Filing: 1994-05-18
•
Granted: 1996-05-07
•
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 08:10
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.
References Cited (Backward Citations)
US767414A
Cited
US1234990A
Cited
US1154546A
Cited
US1700542A
Cited
US1792663A
Cited
US1683441A
Cited
US1727362A
Cited
US1816916A
Cited
US2040627A
Cited
US2185497A
Cited
US2263914A
Cited
US2655032A
Cited
US2749739A
Cited
US2881614A
Cited
US3209510A
Cited
US3295281A
Cited
US3534518A
Cited
US3609926A
Cited
DE2228687A1
Cited
DE2452373A1
Cited
US4285179A
Cited
US4425748A
Cited
US4228628A
Cited
US4355549A
Cited
US4295313A
Cited
US4532747A
Cited
US4590729A
Cited
US5048250A
Cited
US5291711A
Cited
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 |