Patent US3458434A successfully refreshed from Google Patents.
US3458434A
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Process for treating sewage
Assignee: PHILIP W PETER
•
Filing: 1966-02-24
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Granted: 1969-07-29
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Expires: 1986-02-24
Abstract
No abstract record available.
Inventors
- 👤 Philip W Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:44
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/26; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B01D17/06; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4676; C02F1/40; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US744171A
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US763026A
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US1746964A
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US2305549A
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US3054602A
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US3220706A
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US3271304A
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US3336220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |