US2511226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluophosphate glass
Assignee: Eastman Kodak Co
•
Filing: 1947-03-26
•
Granted: 1950-06-13
•
Expires: 1967-03-26
Abstract
No abstract record available.
Inventors
- 👤 Sun Kuan-Han
- 👤 Thomas E Callcar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/23; C03C3/247; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A FLUOPHOSPHATE OPTICAL GLASS CONSISTING OF THE FUSED HEAT REACTION PRODUCT OF A BATCH CONSISTING OF COMPATIBLE MATERIALS AND CONTAINING IN MOLE PROPORTION BARIUM FLUORIDE 35 TO 71 PERCENT, ALUMINUM METAPHOSPHATE 14 TO 35 PERCENT, AND CADMIUM FLUORIDE 10 TO 35 PERCENT THE TOTAL MOLE AND PERCENT OF BARIUM FLUORIDE, ALUMINUM PHOS-
Claim 2
Dependent Claim
52 words
A FLUOPHOSPHATE OPTICAL GLASS CONSISTING OF THE FUSED HEAT REACTION PRODUCT OF A BATCH CONSISTING OF COMPATIBLE MATERIALS AND CONTAINING IN MOLE PROPORTION BARIUM FLUORIDE 35 TO 71 PERCENT, ALUMINUM METAPHOSPHATE 14 TO 35 PERCENT, AND CADMIUM FLUORIDE 10 TO 35 PERCENT THE TOTAL MOLE AND PERCENT OF BARIUM FLUORIDE, ALUMINUM PHOS-
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) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |