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Patent US3421135A successfully refreshed from Google Patents.
US3421135A
Expired / Lapsed
US
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Assignee: Illinois Tool Works Inc
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Filing: 1967-03-31
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Granted: 1969-01-07
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Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Edmund J Soltysik
- 👤 Francis E Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:37
CPC Classifications
H; H01; H01R; H01R9/00; H01R9/16; H01R4/00; H01R4/28; H01R4/30; H01R4/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313572A
Cited
US1385928A
Cited
US2574330A
Cited
US2730690A
Cited
US3050706A
Cited
US3340497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |