US4360544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organotin surface treatment and interleaving material for glass sheets
Assignee: PPG Industries Inc
•
Filing: 1981-01-28
•
Granted: 1982-11-23
•
Expires: 2001-01-28
Abstract
Abstract A method is disclosed for protecting glass surfaces in a stack of glass sheets by treating the surfaces with an organotin compound and separating adjacent surfaces with an interleaving material.
Inventors
- 👤 Helmut Franz
- 👤 Paul F. Duffer
- 👤 Joseph D. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
B; B65; B65G; B65G49/00; B65G49/05; B65G49/06; B65G49/068; B65G49/069; C; C03; C03C; C03C17/00; C03C17/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A method for protecting a glass surface which comprises the steps of: a. treating the glass surface with an organotin compound at a temperature insufficient to thermally decompose said organotin compound; and b. applying to the organotin treated glass surface an interleaving material prior to contacting the glass surface in facing relationship with another glass surface.
Claim 2
Independent Claim
56 words
A method for protecting a glass surface which comprises the steps of: a. treating the glass surface with an organotin compound at a temperature insufficient to thermally decompose said organotin compound; and b. applying to the organotin treated glass surface an interleaving material prior to contacting the glass surface in facing relationship with another glass surface.
Claim 3
Dependent Claim
19 words
The method according to claim 1, wherein the glass surface is treated with a solution of an alkyltin halide.
Claim 4
Dependent Claim
19 words
The method according to claim 2, wherein the glass surface is treated with an aqueous solution of methyltin chloride.
Claim 5
Dependent Claim
35 words
The method according to claim 3, wherein the glass surface is treated with a dilute aqueous solution of a methyltin chloride composition selected from the group consisting of dimethyltin dichloride, methyltin trichloride and mixtures thereof.
Claim 6
Dependent Claim
14 words
The method according to claim 1, wherein the interleaving material is a particulate solid.
Claim 7
Dependent Claim
17 words
The method according to claim 5, wherein the particulate solid interleaving material is a porous cellulose material.
Claim 8
Dependent Claim
13 words
The method according to claim 6, wherein the interleaving material is wood flour.
Claim 9
Dependent Claim
16 words
The method according to claim 5, wherein the particulate solid interleaving material is a synthetic polymer.
Claim 10
Dependent Claim
22 words
The method according to claim 8, wherein the interleaving material is selected from the group consisting of polyethylene, polystyrene, polytetrafluoroethylene and polymethylmethacrylate.
References Cited (Backward Citations)
US2973089A
Cited
US3647531A
Cited
US3723312A
Cited
US4011359A
Cited
US4200670A
Cited
US4263371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |