US3287608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay control circuit
Assignee: Westinghouse Air Brake Co
•
Filing: 1963-06-03
•
Granted: 1966-11-22
•
Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Adolf G Pokrant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125707A
Cited
US2977510A
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US2924724A
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US2923863A
Cited
US3018420A
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US2963596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |