US2788658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating and localizing leaks in gas-pressure protected cables
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1952-11-28
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Granted: 1957-04-16
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Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Liden Sten Olov
- 👤 Petren Arvid Rickard
- 👤 Swenson John Sture
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:11
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2838; G01M3/04; G01M3/16; G01M3/18; G01M3/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853882A
Cited
US1904226A
Cited
US1985348A
Cited
NL35023C
Cited
US2092560A
Cited
US2346461A
Cited
US2612037A
Cited
US2621268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |