US2415180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder rung fastening means
Assignee: J R Clark Co
•
Filing: 1944-05-27
•
Granted: 1947-02-04
•
Expires: 1964-05-27
Abstract
No abstract record available.
Inventors
- 👤 Edward T John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:51
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; F; F16; F16B; F16B2200/00; F16B2200/20; Y; Y10; Y10T; Y10T403/00; Y10T403/33; Y10T403/46; Y10T403/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US523898A
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US751765A
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GB189807648A
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US635185A
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US843989A
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US985761A
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US1001265A
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US1531916A
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US1791688A
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US2271266A
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US2318776A
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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) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |