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US2858939A
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US
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Sewage disposal system
Assignee: WICKLAND Manufacturing Co
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Filing: 1956-05-10
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Granted: 1958-11-04
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Robert F Corliss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16; Y; Y10; Y10S; Y10S4/00; Y10S4/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553994A
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US1303358A
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US1666515A
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US1948125A
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US1982266A
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US2144386A
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US2246224A
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US2724837A
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US2740971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |