US3143432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1960-01-06
•
Granted: 1964-08-04
•
Expires: 1980-01-06
Abstract
No abstract record available.
Inventors
- 👤 Bromer Heinz
- 👤 Norbert L Meinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
OPTICAL GLASS WITH HIGH INDEX OF REFRACTION AND SMALL DISPERSION CONSISTING ESSENTIALLY OF
Claim 2
Dependent Claim
13 words
OPTICAL GLASS WITH HIGH INDEX OF REFRACTION AND SMALL DISPERSION CONSISTING ESSENTIALLY 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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |