US3109512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepladder
Assignee: Individual
•
Filing: 1961-09-11
•
Granted: 1963-11-05
•
Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Alva R Tilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:36
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
IN A FOLDING STEPLADDER HAVING FRONT AND REAR LEGS PIVOTALLY RELATED IN CONVENTIONAL MANNER AND A PLURALITY OF STATIONARY TREADS SUPPORTED BY THE FRONT LEGS THEREOF; AN ATTACHING PLATE CONNECTED TO ONE OF SAID FRONT LEGS, SAID ATTACHING PLATE BEING NOTCHED ALONG ITS BASE, SAID NOTCHED PORTION ENGAGING ONE OF SAID STATIONARY TREADS ALONG ITS REAR EDGE, SAID PLATE HAVING A PORTION EXTENDING PARTIALLY BELOW THE REAR EDGE OF SAID ONE STATIONARY TREAD, A SUPPLEMENTAL TREAD HAVING A LONGITUDINAL FRONT EDGE ADJACENT THE REAR EDGE OF SAID ONE STATIONARY TREAD PIVOTALLY CONNECTED TO SAID ATTACHING PLATE THROUGH SAID PORTION THEREOF EXTENDING PARTIALLY BELOW SAID REAR EDGE OF SAID ONE STATIONARY TREAD, AND A SUPPORTING MEMBER PIVOTALLY CONNECTED AT ONE END TO SAID PLATE AND AT ITS OTHER END TO SAID SUPPLEMENTAL STEP ALONG THE REAR EDGE THEREOF WHEREBY THE LATTER IS ADAPTED TO BE FOLDED UPWARDLY.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |