US2637670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the stripping of mirror backing
Assignee: Turco Products Inc
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Filing: 1947-01-17
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Granted: 1953-05-05
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Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Keith E Brown
- 👤 Francis E Clark
- 👤 Clark E Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:29
CPC Classifications
C; C03; C03C; C03C23/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A PROCESS FOR REMOVING SILVER MIRROR FILMS FROM GLASS, WHICH COMPRISES IMMERSING THE MIRROR IN A MIRROR STRIPPING AGENT COMPRISING A WATER SOLUTION CONTAINING SULFIDE IONS AT A TEMPERATURE IN THE RANGE OF ATMOSPHERIC TO ABOUT 175* F., REMOVING THE MIRROR FILM FROM THE GLASS, AND WASHING THE GLASS.
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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |