US2436518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hospital bed signal
Assignee: Individual
•
Filing: 1945-02-12
•
Granted: 1948-02-24
•
Expires: 1965-02-12
Abstract
No abstract record available.
Inventors
- 👤 William R Lieffers
- 👤 Richard T Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:31
CPC Classifications
G; G08; G08B; G08B7/00; G08B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US433560A
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US1572695A
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US1021436A
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US1376712A
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US1416263A
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US1606678A
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US1915985A
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US2162709A
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US2103744A
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US2214317A
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US2196501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |