Patent US3500132A successfully refreshed from Google Patents.
US3500132A
Expired / Lapsed
US
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Electric circuit for transmission of power and information by common lines
Assignee: INVALCO Inc
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Filing: 1966-12-19
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Granted: 1970-03-10
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Sheyrl W Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:00
CPC Classifications
G; G08; G08C; G08C15/00; H; H04; H04B; H04B3/00; H04B3/54; H04B2203/00; H04B2203/54; H04B2203/5429; H04B2203/5433; H04B2203/5462; H04B2203/5483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3351934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |