US3280831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step walker
Assignee: Individual
•
Filing: 1964-08-31
•
Granted: 1966-10-25
•
Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Parker Alene Mccall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:00
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H3/0288; A61H2003/001; A61H2003/0216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A WALKING AID, FIRST AND SECOND ELONGATED UPRIGHTS, FIRST AND SECOND PARALLEL DISCRETE HAND GRIP MEANS RIGIDLY INTERCONNECTING SAID UPRIGHTS IN SUBSTANTIALLY PARALLEL SPACED RELATION AT THEIR TOP ENDS, AND AT HORIZONTALLY SPACED POINTS BELOW SAID TOP ENDS, RESPECTIVELY, SAID ELONGATED UPRIGHTS BEING SPACED APART BY A DISTANCE AT LITTLE
Claim 2
Dependent Claim
51 words
IN A WALKING AID, FIRST AND SECOND ELONGATED UPRIGHTS, FIRST AND SECOND PARALLEL DISCRETE HAND GRIP MEANS RIGIDLY INTERCONNECTING SAID UPRIGHTS IN SUBSTANTIALLY PARALLEL SPACED RELATION AT THEIR TOP ENDS, AND AT HORIZONTALLY SPACED POINTS BELOW SAID TOP ENDS, RESPECTIVELY, SAID ELONGATED UPRIGHTS BEING SPACED APART BY A DISTANCE AT LITTLE
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Cited
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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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |