Patent US3400975A successfully refreshed from Google Patents.
US3400975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Footrest and associated linkage for chair
Assignee: Royal Development Co Inc
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Filing: 1967-02-01
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Granted: 1968-09-10
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Expires: 1987-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter Clark Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:30
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/034; A47C1/035; A47C1/0355
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2974720A
Cited
US3100668A
Cited
US3114573A
Cited
US3096118A
Cited
US3244449A
Cited
US3244448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |