US2807122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and fusing glass articles
Assignee: American Optical Corp
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Filing: 1954-05-26
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Granted: 1957-09-24
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Expires: 1974-05-26
Abstract
No abstract record available.
Inventors
- 👤 Lee O Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/22; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
156 words
IN THE ART OF HEAT-JOINING PIECES OF GLASS SUSCEPTIBLE TO THE FORMATION OF A HYDRATED SILICATE FILM ON THE SURFACES THEREOF, THE STEPS OF FORMING A FINISHED POLISHED SURFACE ON EACH OF SAID PIECES OF GLASS TO BE JOINED, CLEANSING SAID PIECES IN CONTAMINATED WATER HEATED TO A TEMPERATURE OF FROM 125* TO 135*F. TO REMOVE FOREIGN MATTER THEREFROM, REFRIGERATING SAID PIECES AT A TEMPERATURE NEAR 0*F. DIRECTLY SUBSEQUENT TO SAID CLEANSING AND FOR A TIME INTERVAL SUFFICIENT TO SUBSTANTIALLY DEHYDRATE SAID PIECES, REMOVING SAID PIECES FROM SAID REFRIGERATION SUBSEQUENT TO SAID DEHYDRATION, DIRECTLY SUBJECTING SAID DEHYDRATED PIECES OF GLASS TO A CONTAMINATED WATER BATH SUBNSTANTIALLY AT ROOM TEMPERATURE TO RAISE THE TEMPERATURE OF SAID PIECES OF GLASS ABOVE THE DEW POINT, DRYING AND CLEANSING THE SURFACES OF SAID PIECES OF GLASS TO REMOVE FOREIGN MATTER THEREFROM AND ASSEMBLING AND FUSING SAID POLISHED SURFACES THEREOF TOGETHER WITHIN A TIME INTERVAL OF FROM THREE TO FIVE HOURS.
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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |