US3522887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for a paraplegic wheel chair
Assignee: Individual
•
Filing: 1968-03-25
•
Granted: 1970-08-04
•
Expires: 1988-03-25
Abstract
No abstract record available.
Inventors
- 👤 Edward A Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:15
CPC Classifications
A; A63; A63B; A63B71/00; A63B71/0009; A63B2071/0018; A63B2243/00; A63B2243/0054; A63B47/00; A63B47/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2746527A
Cited
US2979120A
Cited
US3005614A
Cited
US3011648A
Cited
US3233940A
Cited
US3239272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |