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US3525798A
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Fully filled plaster sheathed telecommunication cables
Assignee: Balfour Beatty PLC
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Filing: 1968-03-21
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Granted: 1970-08-25
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Expires: 1988-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles David Forber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:43
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; H01B7/2855; H01B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2345229A
Cited
GB776174A
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US2968576A
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US2860801A
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US3188265A
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US3098113A
Cited
US3445324A
Cited
US3344228A
Cited
US3427394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |