US3260787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor heat dissipators
Assignee: Birtcher Corp
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Filing: 1962-12-20
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Granted: 1966-07-12
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Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Horace T Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10W40/611; H10W40/20; H10W40/231; H10W40/235; H10W40/237
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A HEAT DISSIPATIONG DEVICE FOR ELECTRICAL CIRCUIT MEANS COMPRISING: A THIN METAL SHEET FOLDED INWARDLY AT A PLURALITY OF LOCATIONS TO FORM A PLURALITY OF SPACED FINS EXTENDING OUTWARDLY FROM A COMMON VERTICAL AXIS; EACH OF SAID FINS COMPRISING A PAIR OF TRIANGULAR SHAPED WALLS ADJACENT ONE ANOTHER AND HAVING INNER EDGES LOCATED AT SAID VERTICAL AXIS;
Claim 2
Dependent Claim
57 words
A HEAT DISSIPATIONG DEVICE FOR ELECTRICAL CIRCUIT MEANS COMPRISING: A THIN METAL SHEET FOLDED INWARDLY AT A PLURALITY OF LOCATIONS TO FORM A PLURALITY OF SPACED FINS EXTENDING OUTWARDLY FROM A COMMON VERTICAL AXIS; EACH OF SAID FINS COMPRISING A PAIR OF TRIANGULAR SHAPED WALLS ADJACENT ONE ANOTHER AND HAVING INNER EDGES LOCATED AT SAID VERTICAL AXIS;
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |