Patent US3538518A successfully refreshed from Google Patents.
US3538518A
Expired / Lapsed
US
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Flushing manifold for portable toilets
Assignee: Kidde Inc
•
Filing: 1968-12-09
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Granted: 1970-11-10
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Expires: 1988-12-09
Abstract
No abstract record available.
Inventors
- 👤 Robert C Helke
- 👤 Charles E Vangilder
- 👤 Max W Burgner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:18
CPC Classifications
E; E03; E03D; E03D11/00; E03D11/02; E03D11/08; E03D2201/00; E03D2201/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2486736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |