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US2820620A
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Apparatus and process for heating liquids
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1954-07-22
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Granted: 1958-01-21
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Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Arvid A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:20
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; Y; Y10; Y10S; Y10S261/00; Y10S261/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US145538A
Cited
US613093A
Cited
GB403080A
Cited
US2452260A
Cited
US2455498A
Cited
US2545028A
Cited
FR1040298A
Cited
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 |