Patent US4647912A successfully refreshed from Google Patents.
Patent US3513875A successfully refreshed from Google Patents.
US3513875A
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Closure device
Assignee: Illinois Tool Works Inc
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Filing: 1968-03-14
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Granted: 1970-05-26
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Expires: 1988-03-14
Abstract
No abstract record available.
Inventors
- 👤 John F Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:13
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/062; F25D23/064; F16; F16K; F16K15/00; F16K15/14; F16K15/141; F16K7/00; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/598; Y10T137/612; Y10T137/613; Y10T137/6137; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/698; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7914; Y10T403/00; Y10T403/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1913116A
Cited
US2521961A
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US2564023A
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GB745754A
Cited
US2904065A
Cited
US3364941A
Cited
US3422837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |