US3488974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purifying apparatus
Assignee: Carrier Corp
•
Filing: 1965-01-04
•
Granted: 1970-01-13
•
Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 Peter J Lunde
- 👤 Charles A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1930570A
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US2059065A
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US2082752A
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US2503395A
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US2788643A
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US3012409A
Cited
GB907644A
Cited
US3070969A
Cited
US3222880A
Cited
US3319436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |