US3841739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of cu-as-se glass to transmit long wavelength radiation
Assignee: Hoya Glass Works Ltd
•
Filing: 1973-04-27
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Granted: 1974-10-15
•
Expires: 1993-04-27
Abstract
Abstract An infrared transmitting glass produced by adding Cu to a chalcogenide glass in an amount of 12 - 40 atomic percent of the latter.
Inventors
- 👤 Y Asahara
- 👤 T Izumitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/321; C03C4/00; C03C4/10; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S65/00; Y10S65/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF USING A GLASS CONSISTING OF 12-40 ATOMIC PERCENT OF CU, 25-60 ATOMIC PERCENT OF AS AND 25-60 ATOMIC PERCENT OF SE TO TRANSMIT INFRARED RADIATION AT 12.8 AND 16 MICRONS AND UP TO A TRANSMITTING EDGE OF 20 MICRONS.
Claim 2
Dependent Claim
42 words
THE PROCESS OF USING A GLASS CONSISTING OF 12-40 ATOMIC PERCENT OF CU, 25-60 ATOMIC PERCENT OF AS AND 25-60 ATOMIC PERCENT OF SE TO TRANSMIT INFRARED RADIATION AT 12.8 AND 16 MICRONS AND UP TO A TRANSMITTING EDGE OF 20 MICRONS.
References Cited (Backward Citations)
US3279938A
Cited
US3657006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |