US3099336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated stair
Assignee: Individual
•
Filing: 1960-11-14
•
Granted: 1963-07-30
•
Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Floyd L Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/022; E04F11/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A STAIR COMPRISING A PLURALITY OF METAL INDEPENDENT STEP UNITS, EACH UNIT COMPRISING A PAIR OF CHANNEL SHAPED STRINGERS SPACED FROM EACH OTHER AND HAVING HORIZONTALLY EXTENDING FLANGES THEREOF CONTACTING AND OVERHANGING HORIZONTALLY EXTENDING FLANGES OF THE STRINGERS OF A SUBJACENT UNIT, THE OVERHANGING FLANGES OF THE STRINGERS HAVING A PLURLAITY OF VERTICALLY ALIGNED OPENINGS THEREIN WHEREBY ADJACENT STRINGERS MAY BE ADJUSTED RELATIVE TO EACH OTHER TO VARY THE AMOUNT OF OVERHANG BETWEEN ADJACENT STRINGERS, AND MEANS PASSING THROUGH THE ALIGNED OPENINGS TO SECURE THE UNITS TOGETHER.
Claim 2
Dependent Claim
87 words
A STAIR COMPRISING A PLURALITY OF METAL INDEPENDENT STEP UNITS, EACH UNIT COMPRISING A PAIR OF CHANNEL SHAPED STRINGERS SPACED FROM EACH OTHER AND HAVING HORIZONTALLY EXTENDING FLANGES THEREOF CONTACTING AND OVERHANGING HORIZONTALLY EXTENDING FLANGES OF THE STRINGERS OF A SUBJACENT UNIT, THE OVERHANGING FLANGES OF THE STRINGERS HAVING A PLURLAITY OF VERTICALLY ALIGNED OPENINGS THEREIN WHEREBY ADJACENT STRINGERS MAY BE ADJUSTED RELATIVE TO EACH OTHER TO VARY THE AMOUNT OF OVERHANG BETWEEN ADJACENT STRINGERS, AND MEANS PASSING THROUGH THE ALIGNED OPENINGS TO SECURE THE UNITS TOGETHER.
References Cited (Backward Citations)
US2593683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |