US3175654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair unit assemblies
Assignee: METAL SERVICE CO Inc
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Filing: 1963-03-21
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Granted: 1965-03-30
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 William B Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A STAIR UNIT COMPRISING: A FIRST RUN OF STAIRS DISPOSED AT AN ANGLE TO THE HORIZONTAL; A SECOND RUN OF STAIRS DISPOSED AT AN ANGLE TO THE HORIZONTAL BUT SUBSTANTIALLY OPPOSITELY DISPOSED FROM SAID FIRST RUN OF STAIRS; MAIN SUPPORT MEMBERS EXTENDING UPWARDLY THROUGH THE SPACE DEFINED BY THE INSIDE EDGES OF SAID FIRST AND SECOND RUNS OF STAIRS ADJACENT THE ENDS THEREOF; MEANS CONNECTING SAID RUNS OF STAIRS TO SAID MAIN SUPPORT MEMBERS TO PROVIDE PARTIAL SUPPORT TO SAID RUNS OF STAIRS PENDING THE CONSTRUCTION OF THE STAIRWELL WALLS; MEANS FOR EMBEDDING IN THE WALLS OF A STAIRWELL SO AS TO PROVIDE FULL SUPPORT FOR SAID RUNS OF STAIRS AFTER THE WALLS ARE CONSTRUCTED; AND AUXILIARY SUPPORT MEANS COOPERATING WITH SAID MAIN SUPPORT MEANS TO MAINTAIN THE ENTIRE UNIT VERTICALLY PENDING THE CONSTRUCTION OF THE STAIRWELL WALLS.
Claim 2
Dependent Claim
138 words
A STAIR UNIT COMPRISING: A FIRST RUN OF STAIRS DISPOSED AT AN ANGLE TO THE HORIZONTAL; A SECOND RUN OF STAIRS DISPOSED AT AN ANGLE TO THE HORIZONTAL BUT SUBSTANTIALLY OPPOSITELY DISPOSED FROM SAID FIRST RUN OF STAIRS; MAIN SUPPORT MEMBERS EXTENDING UPWARDLY THROUGH THE SPACE DEFINED BY THE INSIDE EDGES OF SAID FIRST AND SECOND RUNS OF STAIRS ADJACENT THE ENDS THEREOF; MEANS CONNECTING SAID RUNS OF STAIRS TO SAID MAIN SUPPORT MEMBERS TO PROVIDE PARTIAL SUPPORT TO SAID RUNS OF STAIRS PENDING THE CONSTRUCTION OF THE STAIRWELL WALLS; MEANS FOR EMBEDDING IN THE WALLS OF A STAIRWELL SO AS TO PROVIDE FULL SUPPORT FOR SAID RUNS OF STAIRS AFTER THE WALLS ARE CONSTRUCTED; AND AUXILIARY SUPPORT MEANS COOPERATING WITH SAID MAIN SUPPORT MEANS TO MAINTAIN THE ENTIRE UNIT VERTICALLY PENDING THE CONSTRUCTION OF THE STAIRWELL WALLS.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |