US2863594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fold up and rollaway step
Assignee: Individual
•
Filing: 1955-09-01
•
Granted: 1958-12-09
•
Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Shafer John Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:28
CPC Classifications
B; B60; B60R; B60R3/00; B60R3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732919A
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US854789A
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US1222876A
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US2170870A
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US2230015A
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US2279329A
Cited
US2600670A
Cited
US2642217A
Cited
US2678831A
Cited
US2764422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |