US3468135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food chilling using carbon dioxide refrigerant
Assignee: BRENDAN L DOLL
•
Filing: 1968-01-02
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Granted: 1969-09-23
•
Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 Brendan L Doll
- 👤 Gregory W Doll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:05
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/12; F25D3/127; A; A23; A23B; A23B2/00; A23B2/80; A23B2/803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2640333A
Cited
US2761769A
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US2893216A
Cited
US2870480A
Cited
US3214928A
Cited
US3304732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |