US3119703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared transmitting glasses
Assignee: Individual
•
Filing: 1961-07-31
•
Granted: 1964-01-28
•
Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Given W Cleek
- 👤 Edgar H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:20
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/253; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A NON-CRYSTALLINE INFRARED TRANSMITTING GLASS HAVING A HIGH REFRACTIVE INDEX, GOOD TRANSMITTANCES AT WAVELENGTHS BELOW SIX MICRONS, HIGH DEFORMATION TEMPERATURES, AND GOOD RESISTANCE TOCHEMICAL ATTACK OVER THE ENTIRE PH RANGE CONSISTING OF:
Claim 2
Dependent Claim
32 words
A NON-CRYSTALLINE INFRARED TRANSMITTING GLASS HAVING A HIGH REFRACTIVE INDEX, GOOD TRANSMITTANCES AT WAVELENGTHS BELOW SIX MICRONS, HIGH DEFORMATION TEMPERATURES, AND GOOD RESISTANCE TOCHEMICAL ATTACK OVER THE ENTIRE PH RANGE CONSISTING OF:
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |