Patent US3544442A successfully refreshed from Google Patents.
US3544442A
Expired / Lapsed
US
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Apparatus for producing and dispensing sodium hypochlorite
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1968-05-29
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Granted: 1970-12-01
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Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Edward P Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C02F1/4674; C25; C25B; C25B9/00; C25B9/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US535267A
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US844262A
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US2864750A
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US3282823A
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US3378479A
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US3481857A
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US3479275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |