Patent US3487475A successfully refreshed from Google Patents.
US3487475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically operated self-contained sewerage system
Assignee: Kidde Inc
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Filing: 1966-11-29
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Granted: 1970-01-06
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Max E Minniear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US930158A
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US1035241A
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US2249739A
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US2437435A
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US2740971A
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US3067433A
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US3005993A
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US3042933A
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US3172131A
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FR1355441A
Cited
US3289214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |