US3839113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing thin plate glass
Assignee: Hitachi Ltd
•
Filing: 1973-04-18
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Granted: 1974-10-01
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Expires: 1993-04-18
Abstract
Abstract A method of manufacturing a thin plate glass by chemical etching, wherein a chemical etching solution is sprayed from a sprayer onto the surface of a thick plate glass held substantially in a vertical position, and said thick plate glass and said sprayer are caused to make a relative movement during the operation of spray, whereby the etching solution is sprayed substantially uniformly to the surface of the thick plate glass.
Inventors
- 👤 T Yoshida
- 👤 M Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
C; C03; C03C; C03C15/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133302
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A METHOD FOR MANUFACTURING A THIN PLATE GLASS BY CHEMICAL ETCHING, COMPRISING THE STEP OF HOLDING A STARING PLATE GLASS IN A SUBSTANTIALLY VERTICAL POSITION, THE STEP OF SPRAYING CHEMICAL ETCHING SOLUTION BY A SPRAYER ONTO AT LEAST ONE SURFACE OF SAID STARTING PLATE GLASS, AND THE STEP OF CAUSING SAID STARTING PLATE GLASS AND SPRAYER TO MAKE A RELATIVE MOVEMENT WHILE SAID CHEMICAL ETCHING SOLUTION IS BEING SPRAYED THEREBY TO MAKE UNIFORM THE DEGREE OF ETCHING OVER THE ENTRIE AREA OF SAID SURFACE.
Claim 2
Independent Claim
84 words
A METHOD FOR MANUFACTURING A THIN PLATE GLASS BY CHEMICAL ETCHING, COMPRISING THE STEP OF HOLDING A STARING PLATE GLASS IN A SUBSTANTIALLY VERTICAL POSITION, THE STEP OF SPRAYING CHEMICAL ETCHING SOLUTION BY A SPRAYER ONTO AT LEAST ONE SURFACE OF SAID STARTING PLATE GLASS, AND THE STEP OF CAUSING SAID STARTING PLATE GLASS AND SPRAYER TO MAKE A RELATIVE MOVEMENT WHILE SAID CHEMICAL ETCHING SOLUTION IS BEING SPRAYED THEREBY TO MAKE UNIFORM THE DEGREE OF ETCHING OVER THE ENTRIE AREA OF SAID SURFACE.
Claim 3
Dependent Claim
45 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said chemical etching solution consists of 10 -35 percent of hydrofluoric acid, 10 - 35 percent of hydrochloric acid, 0.1 - 10 percent of sulfuric acid and the balance of water.
Claim 4
Dependent Claim
45 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said chemical etching solution consists of 15 -25 percent of hydrofluoric acid, 15 - 25 percent of hydrochloric acid, 1 - 4 percent of sulfuric acid and the balance of water.
Claim 5
Dependent Claim
43 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said chemical etching solution consists of about 20 percent of hydrofluoric acid, about 15 percent of hydrochloric acid, about 2 percent of sulfuric acid and the balance of water.
Claim 6
Dependent Claim
25 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein the thickness of the thin plate glass is 0.1 -0.7 mm.
Claim 7
Dependent Claim
25 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said relative movement is achieved by moving the starting plate glass.
Claim 8
Dependent Claim
23 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said relative movement is achieved by moving the sprayer.
Claim 9
Dependent Claim
28 words
A method of manufacturing a thin plate glass, as claimed in claim 1, wherein said relative movement is achieved by moving the starting plate glass and the sprayer.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |