US4880668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror protective composition comprising 2-mercaptothiazoline
Assignee: PPG Industries Inc
•
Filing: 1986-03-27
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Granted: 1989-11-14
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Expires: 2006-03-27
Abstract
Abstract This invention relates to 2-mercaptothiazoline-containing resinous protective compositions which can be lead-free compositions for mirror-back coatings which are useful in reducing or preventing corrosion.
Inventors
- 👤 Deborah E. Hayes
- 👤 Alan B. Weissberg
- 👤 Charles B. Friedlander
- 👤 Edward T. Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/38; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12993; Y10T428/31; Y10T428/315
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
In an improved process for preparing a protective coating for a mirror comprising applying a protective composition to the mirror having a surface layer of silver, copper, nickel or a mixture thereof, the improvement comprising using the protective coating comprising a reaction product of: (a) 2-mercaptothiazoline, and (b) a resinous material or a precursor thereof.
Claim 2
Dependent Claim
55 words
In an improved process for preparing a protective coating for a mirror comprising applying a protective composition to the mirror having a surface layer of silver, copper, nickel or a mixture thereof, the improvement comprising using the protective coating comprising a reaction product of: (a) 2-mercaptothiazoline, and (b) a resinous material or a precursor thereof.
Claim 3
Dependent Claim
11 words
A mirror which is prepared by the process of claim 1.
Claim 4
Dependent Claim
12 words
A silver-only mirror which is prepared by the process of claim 1.
References Cited (Backward Citations)
GB1050785A
Cited
US2316011A
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US2393801A
Cited
US2719827A
Cited
GB1057871A
Cited
US3837964A
Cited
US4350804A
Cited
US4357396A
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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) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |