Patent US3506989A successfully refreshed from Google Patents.
US3506989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard rail for hospital bed
Assignee: Dominion Metalware Industries Ltd
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Filing: 1968-04-29
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Granted: 1970-04-21
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Oakland K Ross
- 👤 Robert F Knight
- 👤 Stanley Rachlinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/05; A61G7/0507; A61G7/0508; A61G7/0509; A61G7/0512; A61G7/0515
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2669732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |