Patent US2867824A successfully refreshed from Google Patents.
US2867824A
Expired / Lapsed
US
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Method for making sheet material split-ring lock washers
Assignee: Illinois Tool Works Inc
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Filing: 1955-05-04
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Granted: 1959-01-13
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Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 John B O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:19
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; B21D53/20; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/958; Y10T; Y10T83/00; Y10T83/04; Y10T83/0524; Y10T83/0572
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US329544A
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US1190500A
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US1397787A
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US1504511A
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US1910214A
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US1835002A
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US2260053A
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US2635572A
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US2697865A
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US2712768A
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US2742279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |