US2879147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching glass
Assignee: Individual
•
Filing: 1956-08-17
•
Granted: 1959-03-24
•
Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Houston R Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:20
CPC Classifications
C; C03; C03C; C03C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A METHOD OF SELECTIVELY ETCHING PERFORATIONS THROUGH A GLASS BODY WHEREIN A SELECTED PORTION OF THE GLASS IS TRANSFORMED TO ESTABLISH A SOLUBILITY DIFFERENTIAL SO THAT ONE PORTION OF THE GLASS DISSOLVES IN HYDROFLUORIC ACID AT A DIFFERENT RATE FROM THE REMAINING PORTION OF THE GLASS, THE IMPROVEMENT WHICH COMPRISES ETCHING INTO ONE SURFACE OF THE GLASS A SHALLOW PATTERN CORRESPONDING TO THE DESIRED PERFORATION PATTERN AND APPLYING OVER THIS INITIALLY ETCHED SURFACE, INCLUDING THE ETECED CAVITIES THEREIN, A COATING COMPOSED IN PART AT LEAST OF A BORATE COMPOUND AND REACTIVE WITH HYDROFLUORIC ACID TO PRODUCE AN ETCH-RESISTANT PRODUCT WHILE SAID GLASS IS BEING ETCHED.
Claim 2
Dependent Claim
106 words
IN A METHOD OF SELECTIVELY ETCHING PERFORATIONS THROUGH A GLASS BODY WHEREIN A SELECTED PORTION OF THE GLASS IS TRANSFORMED TO ESTABLISH A SOLUBILITY DIFFERENTIAL SO THAT ONE PORTION OF THE GLASS DISSOLVES IN HYDROFLUORIC ACID AT A DIFFERENT RATE FROM THE REMAINING PORTION OF THE GLASS, THE IMPROVEMENT WHICH COMPRISES ETCHING INTO ONE SURFACE OF THE GLASS A SHALLOW PATTERN CORRESPONDING TO THE DESIRED PERFORATION PATTERN AND APPLYING OVER THIS INITIALLY ETCHED SURFACE, INCLUDING THE ETECED CAVITIES THEREIN, A COATING COMPOSED IN PART AT LEAST OF A BORATE COMPOUND AND REACTIVE WITH HYDROFLUORIC ACID TO PRODUCE AN ETCH-RESISTANT PRODUCT WHILE SAID GLASS IS BEING ETCHED.
References Cited (Backward Citations)
US2127781A
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US2337460A
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US2347011A
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US2596617A
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |