Patent US2573576A successfully refreshed from Google Patents.
US2573576A
Expired / Lapsed
US
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Chemical feeder
Assignee: CULLIGAN ZEOLITE Co
•
Filing: 1948-09-14
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Granted: 1951-10-30
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Expires: 1968-09-14
Abstract
No abstract record available.
Inventors
- 👤 George H Klumb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:35
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86743; Y10T137/86751
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE260279C
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US412910A
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US423773A
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FR385173A
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GB300341A
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US1671699A
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US1940720A
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US2329350A
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US2330328A
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US2462886A
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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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |