US2883291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition
Assignee: Servo Corp of America
•
Filing: 1957-03-07
•
Granted: 1959-04-21
•
Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Walter A Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:24
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/321; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S65/00; Y10S65/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN OPTICAL, INFRARED-TRANSMITTING GLASS COMPRISING ESSENTIALLY A FUSED, HEAT-REACTION PRODUCT OF A BATCH CONSISTING ESSENTIALLY OF THE INGREDIENTS AS2TE3, AS2S3 AND AS2SE3 IN AMOUNTS RANGING FORM ABOUT 10% TO 82% AS2TE3, AT LEAST ABOUT 2% AS2A3 AND THE BALANCE ESSENTIALLY AS2SE3 IN AN AMOUNT EXCEEDIG 4%, DETERMINED IN
Claim 2
Dependent Claim
48 words
AN OPTICAL, INFRARED-TRANSMITTING GLASS COMPRISING ESSENTIALLY A FUSED, HEAT-REACTION PRODUCT OF A BATCH CONSISTING ESSENTIALLY OF THE INGREDIENTS AS2TE3, AS2S3 AND AS2SE3 IN AMOUNTS RANGING FORM ABOUT 10% TO 82% AS2TE3, AT LEAST ABOUT 2% AS2A3 AND THE BALANCE ESSENTIALLY AS2SE3 IN AN AMOUNT EXCEEDIG 4%, DETERMINED IN
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |