US2423014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-equalizing housing for transducers
Assignee: PERMOFLUX Corp
•
Filing: 1943-05-10
•
Granted: 1947-06-24
•
Expires: 1963-05-10
Abstract
No abstract record available.
Inventors
- 👤 Webster E Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:18
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1352939A
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US1430257A
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US1430258A
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US1515467A
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US2069242A
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GB425558A
Cited
GB425186A
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US2293078A
Cited
US2345078A
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US2232535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |