US3523076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave irradiation of sewage and sewage sludge
Assignee: Bechtel International Corp
•
Filing: 1968-07-30
•
Granted: 1970-08-04
•
Expires: 1988-07-30
Abstract
No abstract record available.
Inventors
- 👤 David J Goerz Jr
- 👤 Byron H Leonard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:02
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/28; B01D21/283; B01D21/02; C; C02; C02F; C02F1/00; C02F1/30; C02F1/302; C02F9/00; Y; Y10; Y10S; Y10S159/00; Y10S159/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3220945A
Cited
US3272338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |