US3273575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachments for crutches and like walking aids
Assignee: Individual
•
Filing: 1964-06-29
•
Granted: 1966-09-20
•
Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:48
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H3/0288; A61H2003/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US887663A
Cited
US1504902A
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US1897840A
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US2552941A
Cited
US2449509A
Cited
US3151875A
Cited
US3170475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |