US3470500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance network
Assignee: Automatic Electric Laboratories Inc
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Filing: 1966-11-17
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Granted: 1969-09-30
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Expires: 1986-11-17
Abstract
No abstract record available.
Inventors
- 👤 Henry J Orchard
- 👤 William N Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:48
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/03; B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; B21C; B21C47/00; B21C47/02; B21C47/10; B21C47/14; B21C47/143; B21C47/26; B21C47/262; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573; C21D9/5732; H03H11/00; H03H11/46; H03H11/52; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/16; H04B3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |