Patent US2521048A successfully refreshed from Google Patents.
US2521048A
Expired / Lapsed
US
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Method of fabricating glazing units
Assignee: Libbey Owens Ford Glass Co
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Filing: 1945-01-04
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Granted: 1950-09-05
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Expires: 1965-01-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:48
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/24; C03B23/245; E; E06; E06B; E06B3/00; E06B3/66; E06B3/6608
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF FABRICATING AN ALL GLASS UNIT HAVING A DEHYDRATED DEAD AIR SPACE, COMPRISING ARRANGING THE GLASS ELEMENTS OF WHICH THE UNIT IS COMPOSED IN PROPER ASSEMBLED RELATIONSHIP, AND THE FUSING THEM TOGETHER WITH A FLAME PRODUCED FROM SUBSTANTIALLY PURE CARBON MONOXIDE GAS AND A SOURCE OF OXYGEN THAT IS SUBSTANTIALLY FREE OF HYDROGEN AND HYDROGEN-CONTAINING COMPOUNDS.
Claim 2
Independent Claim
58 words
THE METHOD OF FABRICATING AN ALL GLASS UNIT HAVING A DEHYDRATED DEAD AIR SPACE, COMPRISING ARRANGING THE GLASS ELEMENTS OF WHICH THE UNIT IS COMPOSED IN PROPER ASSEMBLED RELATIONSHIP, AND THE FUSING THEM TOGETHER WITH A FLAME PRODUCED FROM SUBSTANTIALLY PURE CARBON MONOXIDE GAS AND A SOURCE OF OXYGEN THAT IS SUBSTANTIALLY FREE OF HYDROGEN AND HYDROGEN-CONTAINING COMPOUNDS.
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |