US3904425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorptive glass
Assignee: American Optical Corp
•
Filing: 1964-06-12
•
Granted: 1975-09-09
•
Expires: 1984-06-12
Abstract
Abstract 1. A glass material having a calculated oxide composition comprising A 100 MICRON THICKNESS OF SAID GLASS MATERIAL HAVING AN OPTICAL DENSITY GREATER THAN 0.25 AT LEAST FOR LIGHT FROM 0.4 TO 0.6 MICRONS WAVELENGTH.
Inventors
- 👤 Robert W Young
- 👤 Robert E Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:12
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C1/00; C03C1/10; C03C13/00; C03C13/04; C03C13/045; C03C13/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
9 words
A GLASS MATERIAL HAVING A CALCULATED OXIDE COMPOSITION COMPRISING
Claim 2
Dependent Claim
9 words
A GLASS MATERIAL HAVING A CALCULATED OXIDE COMPOSITION COMPRISING
Claim 3
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 4
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 5
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 6
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 7
Dependent Claim
8 words
A glass material having a calculated composition comprising
Claim 8
Dependent Claim
8 words
A glass material having a calculated composition comprising
Claim 9
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 10
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 11
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
Claim 12
Dependent Claim
9 words
A glass material having a calculated oxide composition comprising
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |