US3216160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precast concrete step
Assignee: Individual
•
Filing: 1963-04-11
•
Granted: 1965-11-09
•
Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Harold A Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:36
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/022; E04F11/025; E04F11/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PRECAST REINFORCED CONCRETE STEP ADAPTED TO BE ATTACHED TO A SLOPING BEAM AND TO BE SPACED APART FROM OTHER SIMILAR STEPS THEREON TO FORM A STAIRWAY, THE IMPROVEMENT COMPRISING: A BODY OF SOLIDIFIED CEMENTITIOUS MATERIAL HAVING A SUBSTANTIAL PLANE UPPER SURFACE AND AN INCLINED SURFACE ON AT LEAST ONE LOWER SIDE; A METAL REINFORCING BAR MEMBER OF A PREDETERMINED PATTERN BURIED WITHIN SAID BODY AND HAVING SPACED APART PORTIONS EXTENDING LONGITUDINALLY WITHIN SAID BODY; A METAL ATTACHMENT SHOE HAVING A PAIR OF INTERNAL LUG MEMBERS EXTENDING WITHIN SAID STEP AND WELDED TO SAID SPACED APART PORTIONS OF SAID REINFORCING BAR MEMBER; AND EXTERNAL LUG MEMBERS EXTENDING OUTWARDLY FROM SAID INCLINED SURFACE ON SAID BODY AND THEREBY POSITIONED FOR ATTACHMENT TO THE SLOPING BEAM SO THAT THE UPPER SURFACE OF THE STEP IS IN A TRUE HORIZONTAL PLANE.
Claim 2
Dependent Claim
138 words
A PRECAST REINFORCED CONCRETE STEP ADAPTED TO BE ATTACHED TO A SLOPING BEAM AND TO BE SPACED APART FROM OTHER SIMILAR STEPS THEREON TO FORM A STAIRWAY, THE IMPROVEMENT COMPRISING: A BODY OF SOLIDIFIED CEMENTITIOUS MATERIAL HAVING A SUBSTANTIAL PLANE UPPER SURFACE AND AN INCLINED SURFACE ON AT LEAST ONE LOWER SIDE; A METAL REINFORCING BAR MEMBER OF A PREDETERMINED PATTERN BURIED WITHIN SAID BODY AND HAVING SPACED APART PORTIONS EXTENDING LONGITUDINALLY WITHIN SAID BODY; A METAL ATTACHMENT SHOE HAVING A PAIR OF INTERNAL LUG MEMBERS EXTENDING WITHIN SAID STEP AND WELDED TO SAID SPACED APART PORTIONS OF SAID REINFORCING BAR MEMBER; AND EXTERNAL LUG MEMBERS EXTENDING OUTWARDLY FROM SAID INCLINED SURFACE ON SAID BODY AND THEREBY POSITIONED FOR ATTACHMENT TO THE SLOPING BEAM SO THAT THE UPPER SURFACE OF THE STEP IS IN A TRUE HORIZONTAL PLANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |