Patent EP0137648A2 successfully refreshed from Google Patents.
US2846221A
Expired / Lapsed
US
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Collapsible stage structure
Assignee: Individual
•
Filing: 1954-08-10
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Granted: 1958-08-05
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Expires: 1974-08-10
Abstract
No abstract record available.
Inventors
- 👤 Charles E Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:15
CPC Classifications
A; A63; A63J; A63J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE519102A
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FR914836A
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GB610726A
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US526448A
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US534434A
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US669621A
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US1533337A
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US1634127A
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US2316560A
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US2369340A
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CH230723A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |