US2999013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making glass non-reflective
Assignee: Individual
•
Filing: 1959-11-03
•
Granted: 1961-09-05
•
Expires: 1979-11-03
Abstract
No abstract record available.
Inventors
- 👤 Meth Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
C; C03; C03C; C03C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE PROCESS OF FROMING A NON-REFLECTIVE WINDOW GLASS SURFACE WHICH CONSISTS IN ROUGHENING THE SURFACE OF A GLASS ARTICLE TO A DEPTH OF 1.5 TO 2 MILS IN ORDER TO PROVIDE A HEAVY FROSTING THEREOF, IN THEN IMMERSING THE ROUGHENED SURFACE IN AN ACID SOLUTION HAVING A TEMPERATURE BETWEEN 100*F. AND 130*F. AND COMPOSED OF 90%-50% BY VOLUME OF HYDROFLUORIC ACID AND 10%50% BY VOLUME OF SULPHURIC ACID FOR A PERIOD OF TIME RANGING FROM 10 TO 40 SECONDS THEREBY REMOVING A PARTIAL AMOUNT BUT LESS THAN ALL OF SAID FROSTING, IN CONTINUOUSLY SUBJECTING SAID ACID SOLUTION TO SUBSTANTIAL AGITATION BY INJECTING A STREAM OF AIR THEREIN DURING THE IMMERSION WHEREBY SCUM FORMED ON SAID SURFACE BY SAID ACIDS IS CONTINUOUSLY REMOVED AS FORMED, AND IN THEN REMOVING SAID SURFACE FROM SAID SOLUTION, AND IN THROUGHLY WATER RISING IT.
Claim 2
Dependent Claim
139 words
THE PROCESS OF FROMING A NON-REFLECTIVE WINDOW GLASS SURFACE WHICH CONSISTS IN ROUGHENING THE SURFACE OF A GLASS ARTICLE TO A DEPTH OF 1.5 TO 2 MILS IN ORDER TO PROVIDE A HEAVY FROSTING THEREOF, IN THEN IMMERSING THE ROUGHENED SURFACE IN AN ACID SOLUTION HAVING A TEMPERATURE BETWEEN 100*F. AND 130*F. AND COMPOSED OF 90%-50% BY VOLUME OF HYDROFLUORIC ACID AND 10%50% BY VOLUME OF SULPHURIC ACID FOR A PERIOD OF TIME RANGING FROM 10 TO 40 SECONDS THEREBY REMOVING A PARTIAL AMOUNT BUT LESS THAN ALL OF SAID FROSTING, IN CONTINUOUSLY SUBJECTING SAID ACID SOLUTION TO SUBSTANTIAL AGITATION BY INJECTING A STREAM OF AIR THEREIN DURING THE IMMERSION WHEREBY SCUM FORMED ON SAID SURFACE BY SAID ACIDS IS CONTINUOUSLY REMOVED AS FORMED, AND IN THEN REMOVING SAID SURFACE FROM SAID SOLUTION, AND IN THROUGHLY WATER RISING IT.
References Cited (Backward Citations)
US1313233A
Cited
US1016487A
Cited
US1240398A
Cited
GB196421A
Cited
US2036647A
Cited
US2370214A
Cited
US2348704A
Cited
US2328533A
Cited
US2372536A
Cited
US2410300A
Cited
US2670279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |