US2982910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test circuit
Assignee: Phillips Petroleum Co
•
Filing: 1958-06-05
•
Granted: 1961-05-02
•
Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 Boisblanc Deslonde R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:11
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/02; H03K21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2414477A
Cited
GB569279A
Cited
US2471530A
Cited
US2548276A
Cited
US2755436A
Cited
GB758994A
Cited
GB769806A
Cited
GB779046A
Cited
US2929988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |