US2881566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of glass surfaces
Assignee: OI Glass Inc
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Filing: 1956-07-30
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Granted: 1959-04-14
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Badger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR IMPROVING THE DURABILITY OF A GLASS SURFACE BY ENRICHING SAID SURFACE WITH AN INVISIBLE SILICA ZONE WHICH IS INTEGRAL AND CONTINUOUS WITH SAID SURFACE COMPRISING MAINTAINING SAID SURFACE AT A TEMPERATURE WHEREIN SAID GLASS IS PLASTIC AND MAY BE WORKED, APPLYING TO SAID SURFACE AND PYROLIZING THEREON A VAPOR OF ETHYL SILICATE TO FORM AN INTEGRAL AND CONTINUOUS INVISIBLE SILICA REACTION ZONE ON SAID SURFACE, AND THEN COOLING SAID SURFACE.
Claim 2
Independent Claim
73 words
A METHOD FOR IMPROVING THE DURABILITY OF A GLASS SURFACE BY ENRICHING SAID SURFACE WITH AN INVISIBLE SILICA ZONE WHICH IS INTEGRAL AND CONTINUOUS WITH SAID SURFACE COMPRISING MAINTAINING SAID SURFACE AT A TEMPERATURE WHEREIN SAID GLASS IS PLASTIC AND MAY BE WORKED, APPLYING TO SAID SURFACE AND PYROLIZING THEREON A VAPOR OF ETHYL SILICATE TO FORM AN INTEGRAL AND CONTINUOUS INVISIBLE SILICA REACTION ZONE ON SAID SURFACE, AND THEN COOLING SAID SURFACE.
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |