Patent US2820701A successfully refreshed from Google Patents.
US2820701A
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US
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Apparatus for chlorination
Assignee: Individual
•
Filing: 1954-06-28
•
Granted: 1958-01-21
•
Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Donald J Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:13
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/44; A47L15/4436; B; B01; B01F; B01F21/00; B01F21/20; B01F21/22; C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |