US3370948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for selective etching of alkali glass
Assignee: Bausch and Lomb Inc
•
Filing: 1966-04-13
•
Granted: 1968-02-27
•
Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charles H Rosenbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
C; C03; C03C; C03C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD FOR SELECTIVELY ETCHING AN ALKALI GLASS SURFACE COMPRISING (A) MIGRATING SILVER INTO SELECTED SURFACE PORTIONS OF AN ALKALI GLASS SUBSTRATE TO A SUFFICIENT DEGREE SO THAT SAID SELECTED SURFACE PORTIONS EXHIBIT A SUBSTANTIALLY HIGHER RESISTANCE TO FLUORIDE IONS THAN THE OTHER SURFACE PORTIONS OF SAID GLASS SUBSTRATE AND
Claim 2
Independent Claim
50 words
A METHOD FOR SELECTIVELY ETCHING AN ALKALI GLASS SURFACE COMPRISING (A) MIGRATING SILVER INTO SELECTED SURFACE PORTIONS OF AN ALKALI GLASS SUBSTRATE TO A SUFFICIENT DEGREE SO THAT SAID SELECTED SURFACE PORTIONS EXHIBIT A SUBSTANTIALLY HIGHER RESISTANCE TO FLUORIDE IONS THAN THE OTHER SURFACE PORTIONS OF SAID GLASS SUBSTRATE AND
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |