US3279938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared transmitting optical filter having porous antimony triselenide layer
Assignee: Westinghouse Electric Corp
•
Filing: 1961-11-29
•
Granted: 1966-10-18
•
Expires: 1981-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Schneeberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:47
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR820240A
Cited
US2512257A
Cited
US2744837A
Cited
US2932592A
Cited
US2829074A
Cited
US2910602A
Cited
US3020442A
Cited
US3020432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |