US2982626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for etching a glass-containing surface
Assignee: AT&T Inc
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Filing: 1959-09-22
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Granted: 1961-05-02
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Expires: 1979-09-22
Abstract
No abstract record available.
Inventors
- 👤 Ilmars L Kalnins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:51
CPC Classifications
C; C03; C03C; C03C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
METHOD OF REMOVING A COATING OF A GLASS COMPOSITION FROM A SURFACE, SAID COMPOSITION BEING INCLUDED IN AT LEAST ONE SYSTEM SELECTED FROM THE GROUP CONSISTING OF ARSENIC-SULFUR, ARSENIC-SULFUR-THALLIUM, ARSENIC-SULFURIODINE, AND ARSENIC-SULFUR-BROMINE BY USE OF A TWO-PHASE SOLUTION COMPRISING AN AQUEOUS PHASE AND A BROMINE-RICH PHASE, COMPRISING INSERTING THE SAID COATED SURFACE IN THE SAID SOLUTION AND CONTACTING IT IN ALTERNATING FASHION WITH EACH OF THE SAID PHASES UNTIL THE GLASS HAS BEEN REMOVED.
Claim 2
Dependent Claim
74 words
METHOD OF REMOVING A COATING OF A GLASS COMPOSITION FROM A SURFACE, SAID COMPOSITION BEING INCLUDED IN AT LEAST ONE SYSTEM SELECTED FROM THE GROUP CONSISTING OF ARSENIC-SULFUR, ARSENIC-SULFUR-THALLIUM, ARSENIC-SULFURIODINE, AND ARSENIC-SULFUR-BROMINE BY USE OF A TWO-PHASE SOLUTION COMPRISING AN AQUEOUS PHASE AND A BROMINE-RICH PHASE, COMPRISING INSERTING THE SAID COATED SURFACE IN THE SAID SOLUTION AND CONTACTING IT IN ALTERNATING FASHION WITH EACH OF THE SAID PHASES UNTIL THE GLASS HAS BEEN REMOVED.
References Cited (Backward Citations)
US2435889A
Cited
US2482547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |