US2811573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer pressure relief devices
Assignee: Honeywell Inc
•
Filing: 1952-06-16
•
Granted: 1957-10-29
•
Expires: 1972-06-16
Abstract
No abstract record available.
Inventors
- 👤 Elwyn C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12; H01F27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US540419A
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US1476138A
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US833694A
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US1599245A
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US1579141A
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GB216036A
Cited
GB229312A
Cited
US1751939A
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GB482518A
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US2234042A
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GB563418A
Cited
US2694503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |