US2901054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination scaffold-ladders
Assignee: White Metal Rolling and Stamping Corp
•
Filing: 1956-08-28
•
Granted: 1959-08-25
•
Expires: 1976-08-28
Abstract
No abstract record available.
Inventors
- 👤 Clayton E Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/081; E06C1/00; E06C1/02; E06C1/32; E06C1/38; E06C1/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US575397A
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US579437A
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US718306A
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GB190900447A
Cited
US1179391A
Cited
US1330162A
Cited
US1691976A
Cited
US1894489A
Cited
US2024039A
Cited
US2618427A
Cited
US2760706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |