Patent US3299985A successfully refreshed from Google Patents.
US3299985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepladder construction
Assignee: Individual
•
Filing: 1962-11-07
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Granted: 1967-01-24
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Harrison Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A STEPLADDER, SPACED APART SIDE RAILS AND VERTICALLY SPACED STEPS JOINED TO THEIR OPPOSITE ENDS TO SAID SIDE RAILS, EACH OF SAID STEPS INCLUDING A BASE PORTION, TRANSVERSELY EXTENDING LEGS INTEGRALLY FORMED WITH SAID BASE AND JOINED TO ONE ANOTHER AT THEIR FREE ENDS TO THEREBY FORM A CLOSED AND HOLLOW TRIANGULAR CONFIGURATION DEFINED BY THE INTERSECTION OF SAID LEGS WITH SAID BASE PORTION AND WITH ONE ANOTHER, EACH OF SAID STEPS ALSO INCLUDING INTEGRAL STUDS FORMED AT THE OPPOSITE ENDS OF SAID STEPS, SAID STUDS BEING POSITIONED AT THE INTERSECTION OF SAID LEGS WITH SAID BASE PORTION AND WITH ONE ANOTHER, SAID OPPOSED SIDE RAILS HAVING COOPERATIVELY SPACED APART HOLES THEREIN FOR RECEIVING SAID INTEGRAL STUDS.
Claim 2
Dependent Claim
118 words
IN A STEPLADDER, SPACED APART SIDE RAILS AND VERTICALLY SPACED STEPS JOINED TO THEIR OPPOSITE ENDS TO SAID SIDE RAILS, EACH OF SAID STEPS INCLUDING A BASE PORTION, TRANSVERSELY EXTENDING LEGS INTEGRALLY FORMED WITH SAID BASE AND JOINED TO ONE ANOTHER AT THEIR FREE ENDS TO THEREBY FORM A CLOSED AND HOLLOW TRIANGULAR CONFIGURATION DEFINED BY THE INTERSECTION OF SAID LEGS WITH SAID BASE PORTION AND WITH ONE ANOTHER, EACH OF SAID STEPS ALSO INCLUDING INTEGRAL STUDS FORMED AT THE OPPOSITE ENDS OF SAID STEPS, SAID STUDS BEING POSITIONED AT THE INTERSECTION OF SAID LEGS WITH SAID BASE PORTION AND WITH ONE ANOTHER, SAID OPPOSED SIDE RAILS HAVING COOPERATIVELY SPACED APART HOLES THEREIN FOR RECEIVING SAID INTEGRAL STUDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |