US3491271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for electrically conductive heat-dissipating devices
Assignee: English Electric Co Ltd
•
Filing: 1969-04-21
•
Granted: 1970-01-20
•
Expires: 1989-04-21
Abstract
No abstract record available.
Inventors
- 👤 John James Lawrence Weaver
- 👤 Arnaud Michael Eccles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/10; H10W40/60; H10W40/611; H10W40/70; H10W40/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862159A
Cited
US2907935A
Cited
US2887628A
Cited
US3252060A
Cited
FR1381184A
Cited
GB1000023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |