Patent US1789834A successfully refreshed from Google Patents.
Patent US2853121A successfully refreshed from Google Patents.
US2853121A
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US
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Adjustable back rest construction
Assignee: Rockwell-Standard Corp
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Filing: 1957-01-24
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Granted: 1958-09-23
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Herider
- 👤 Herbert A Friesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:47
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/02; B60N2/22; B60N2/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1187745A
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US1835048A
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US2355762A
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US2674300A
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US2550831A
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US2687536A
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US2612939A
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US2767777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |