Patent US3421836A successfully refreshed from Google Patents.
US3421836A
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Method of and apparatus for ozonizing air circulating in a confined refrigerated space
Assignee: Individual
•
Filing: 1964-07-03
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Granted: 1969-01-14
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Expires: 1984-07-03
Abstract
No abstract record available.
Inventors
- 👤 Anita G Sundin
- 👤 Benjamin Caplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:19
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/10; C01B13/11; A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/7045; C01B2201/00; C01B2201/70; F; F24; F24F; F24F8/00; F24F8/20; F24F8/24; F24F8/26
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |