US3498457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic water purifier
Assignee: RUFFIN IND Inc
•
Filing: 1967-10-09
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Granted: 1970-03-03
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Alfredo A Gough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:24
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/30; C02F1/32; C02F1/325; C02F2201/00; C02F2201/32; C02F2201/322; C02F2201/3228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2572971A
Cited
US2669661A
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US2844727A
Cited
US3071828A
Cited
US3366441A
Cited
US3342335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |