Patent US3257761A successfully refreshed from Google Patents.
US3257761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair structure
Assignee: Individual
•
Filing: 1965-06-07
•
Granted: 1966-06-28
•
Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/022; E04F11/025; E04F11/0255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A STAIR STRUCTURE COMPRISING, A MOUNTING BRACKET, A PAIR OF STRINGER PLATES, MEANS FOR PIVOTALLY INTERCONNECTING SAID PAIR OF STRINGER PLATES TO SAID BRACKET, SAID PLATES BEING ADAPTED TO THEREBY TO ASSUME A SELECTIVE INCLINATION TO SAID MOUNTING BRACKET AND POSITION IN GENERALLY PARALLEL SPACED RELATION, ROD MEANS BRIDGING AND SLIP FITTING WITH SAID STRINGER PLATES AT SELECTED POSITION IN PIVOTAL RELATION THERETO, EACH OF SAID ROD MEANS HAVING A TREAD AND RISER MEMBER FIXED TO PIVOT THEREWITH ON AND BETWEEN SAID STRINGER PLATES, SAID MEMBERS ARRANGING N SUCCESSIVELY STEPPED RELATION TO SAID BRACKET, EACH OF SAID MEMBERS AND SAID BRACKET INCLUDING A RISER PORTION THE LOWER END OF WHICH PROVIDES A PROJECTED SHELF, MEANS MOUNTING THE TREAT PORTION OF EACH MEMBER IN ADJUSTABLE RELATION TO THE SHELF ON THE PRECEDING RISER PORTION AND MEANS ESTABLISHING THE TREAD AND RISER MEMBERS IN A FIXED RELATION BETWEEN SAID STRINGER PLATES.
Claim 2
Dependent Claim
149 words
A STAIR STRUCTURE COMPRISING, A MOUNTING BRACKET, A PAIR OF STRINGER PLATES, MEANS FOR PIVOTALLY INTERCONNECTING SAID PAIR OF STRINGER PLATES TO SAID BRACKET, SAID PLATES BEING ADAPTED TO THEREBY TO ASSUME A SELECTIVE INCLINATION TO SAID MOUNTING BRACKET AND POSITION IN GENERALLY PARALLEL SPACED RELATION, ROD MEANS BRIDGING AND SLIP FITTING WITH SAID STRINGER PLATES AT SELECTED POSITION IN PIVOTAL RELATION THERETO, EACH OF SAID ROD MEANS HAVING A TREAD AND RISER MEMBER FIXED TO PIVOT THEREWITH ON AND BETWEEN SAID STRINGER PLATES, SAID MEMBERS ARRANGING N SUCCESSIVELY STEPPED RELATION TO SAID BRACKET, EACH OF SAID MEMBERS AND SAID BRACKET INCLUDING A RISER PORTION THE LOWER END OF WHICH PROVIDES A PROJECTED SHELF, MEANS MOUNTING THE TREAT PORTION OF EACH MEMBER IN ADJUSTABLE RELATION TO THE SHELF ON THE PRECEDING RISER PORTION AND MEANS ESTABLISHING THE TREAD AND RISER MEMBERS IN A FIXED RELATION BETWEEN SAID STRINGER PLATES.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |