Patent US2926741A successfully refreshed from Google Patents.
US3483983A
Expired / Lapsed
US
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Water purification system
Assignee: HORACE L LINDSTROM
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Filing: 1967-07-14
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Granted: 1969-12-16
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Expires: 1987-07-14
Abstract
No abstract record available.
Inventors
- 👤 Horace L Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:44
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/24; B01D21/2433; B01D24/00; B01D24/002; B01D24/005; B01D24/02; B01D24/20; B01D24/24; B01D24/46; B01D24/4631
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |