US3458438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for water treatment
Assignee: Crane Co
•
Filing: 1966-03-09
•
Granted: 1969-07-29
•
Expires: 1986-03-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Smith
- 👤 Robert Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/04; B01J39/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2422054A
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US2711995A
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US2855363A
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US2807582A
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US2841550A
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US3147215A
Cited
FR1274871A
Cited
US3250705A
Cited
US3197401A
Cited
US3382169A
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 |