Patent US2873904A successfully refreshed from Google Patents.
US2873904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible handrail
Assignee: Individual
•
Filing: 1958-02-25
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Granted: 1959-02-17
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Expires: 1978-02-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald R Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/1865; E04F2011/1868; E04F2011/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396886A
Cited
US961357A
Cited
US1343094A
Cited
US2010588A
Cited
US1993437A
Cited
US2594926A
Cited
US2666217A
Cited
US2827016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |