Patent US3531218A successfully refreshed from Google Patents.
US3531218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ejector
Assignee: RTX Corp
•
Filing: 1968-06-27
•
Granted: 1970-09-29
•
Expires: 1988-06-27
Abstract
No abstract record available.
Inventors
- 👤 John L Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:10
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/461
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US718681A
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US824039A
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US1080420A
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US2676575A
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US2691481A
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US3068644A
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US3042290A
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US3143293A
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US3263702A
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US3231197A
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US3423011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |