Patent US3039186A successfully refreshed from Google Patents.
US3039186A
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Method of forming a joint between the rail and rung of a ladder
Assignee: Werner Co
•
Filing: 1957-08-06
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Granted: 1962-06-19
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Expires: 1977-08-06
Abstract
No abstract record available.
Inventors
- 👤 Paul E Stoyer
- 👤 Henry E Valliquette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/08; E06C7/082; E06C7/085; B; B21; B21D; B21D39/00; B21D39/06; B21D39/063; E06C7/087; F; F16; F16B; F16B17/00; F16B17/004; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49934; Y10T29/49938; Y10T29/4994; Y10T403/00; Y10T403/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1954545A
Cited
US2007703A
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US2171863A
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US2293239A
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CH267451A
Cited
US2635717A
Cited
US2667688A
Cited
US2842842A
Cited
US2804679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |