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US2558997A
Expired / Lapsed
US
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Means for preventing loss of cold air from refrigerated spaces
Assignee: AUTOMATIC SCREW PRODUCTS Co
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Filing: 1949-08-09
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Granted: 1951-07-03
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Expires: 1969-08-09
Abstract
No abstract record available.
Inventors
- 👤 Henry H Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/02; F25D23/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US907609A
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US935850A
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US1649290A
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US2241854A
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US2494480A
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US2500606A
Cited
US2462705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |