US3249680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating, heat-sink holder for transistors
Assignee: National Beryllia Corp
•
Filing: 1964-04-14
•
Granted: 1966-05-03
•
Expires: 1984-04-14
Abstract
No abstract record available.
Inventors
- 👤 Allen R Sheets
- 👤 Donald L Utz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:39
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN INSULATING HEAT -SINK HOLDER FOR TRANSISTORS COMPRISING A BERYLLIUM OXIDE DISK HAVING ONE SURFACE THEREOF UNITED THROUGHOUT SAID SURFACE TO A METAL DISK OF SUBSTANTIALLY THE SAME SIZE, A STRIP OF SPRING METAL BEING FORMED WITH A CONTINUOUS SIDE AND WITH A PLURALITY OF FINGERS EXTENDING TRANSVERSELY FROM SAID CONTINUOUS SIDE THEREOF, SAID CONTINUOUS SIDE OF SAID STRIP EXTENDING SUBSTANTIALLY BUT NOT COMPLETELY AROUND THAT PORTION OF SAID METAL DISK SO THAT SAID FINGERS EXTEND AXIALLY IN THE OPPOSITE DIRECTION WITH RESPECT TO SAID BERYLLIUM OXIDE DISK, AND METALLIC MEANS UNITING SAID CONTINUOUS SIDE OF SAID STRIP TO SAID METAL DISK.
Claim 2
Dependent Claim
102 words
AN INSULATING HEAT -SINK HOLDER FOR TRANSISTORS COMPRISING A BERYLLIUM OXIDE DISK HAVING ONE SURFACE THEREOF UNITED THROUGHOUT SAID SURFACE TO A METAL DISK OF SUBSTANTIALLY THE SAME SIZE, A STRIP OF SPRING METAL BEING FORMED WITH A CONTINUOUS SIDE AND WITH A PLURALITY OF FINGERS EXTENDING TRANSVERSELY FROM SAID CONTINUOUS SIDE THEREOF, SAID CONTINUOUS SIDE OF SAID STRIP EXTENDING SUBSTANTIALLY BUT NOT COMPLETELY AROUND THAT PORTION OF SAID METAL DISK SO THAT SAID FINGERS EXTEND AXIALLY IN THE OPPOSITE DIRECTION WITH RESPECT TO SAID BERYLLIUM OXIDE DISK, AND METALLIC MEANS UNITING SAID CONTINUOUS SIDE OF SAID STRIP TO SAID METAL DISK.
References Cited (Backward Citations)
US2964688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |