US3614550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A semiconductor laser device with improved operating efficiency
Assignee: International Business Machines Corp
•
Filing: 1969-01-09
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Granted: 1971-10-19
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Expires: 1989-01-09
Abstract
Abstract An improved electromagnetic wave-emitting device is provided. A high pressure is applied to the device by potting the device in a suitable encapsulant. The potted device exhibits a decreased threshold current density and an increase in its efficiency. Additionally, the device has a more durable structure and an increased shelf life.
Inventors
- 👤 John C Marinace
- 👤 Ralph C Mcgibbon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:52
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
An article as defined in claim 1 wherein said epoxy resin is a diglycidyl ether of bisphenol A, to which triethylene tetramine is added as a curing agent and which has an epoxy equivalent weight of about 172 to 176.
Claim 2
Dependent Claim
25 words
An article as defined in claim 1 wherein said encapsulant has an index of refraction value of about 1.53 measured at a wavelength of 9,000A.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |