Patent US3428555A successfully refreshed from Google Patents.
US3428555A
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US
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Method and an apparatus for purifying waste
Assignee: Resonac Corp
•
Filing: 1967-01-03
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Granted: 1969-02-18
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi Kitagawa
- 👤 Yo Maeda
- 👤 Shuhei Nakamura
- 👤 Toru Miyagi
- 👤 Seiichi Itoh
- 👤 Minondo Kimura
- 👤 Yasuo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/08; C02F3/082; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2098152A
Cited
US2684941A
Cited
US2901114A
Cited
FR1230940A
Cited
US3161590A
Cited
US3266786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |