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US2753572A
Expired / Lapsed
US
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Reciprocating bed
Assignee: Individual
•
Filing: 1953-04-14
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Granted: 1956-07-10
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Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Oliver L Knudson
- 👤 Earl C Eigenbrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:49
CPC Classifications
A; A47; A47D; A47D9/00; A47D9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE497176A
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US238843A
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US329570A
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US371700A
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US437014A
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US820212A
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US1500009A
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US1909204A
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US2631302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |