US3112490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter plate assembly for welding helmets and the like
Assignee: Individual
•
Filing: 1960-09-19
•
Granted: 1963-12-03
•
Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert Malcom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:44
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; A61F9/04; A61F9/06; A61F9/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A FILTER PLATE ASSEMBLY FOR WELDING HELMETS AND THE LIKE COMPRISING, A TRANSPARENT SYNTHETIC PLASTIC MASTER PLATE HAVING A THIN FILM OF METAL DEPOSITED THEREON FOR FILTERING PRINCIPALLY INFRARED AND ULTRAVIOLET RAYS AND ALSO VISIBLE RAYS AND HAVING A PREDETERMINED HIGH SAFE SHADE VALUE FOR INFRARED AND ULTRAVIOLET RAYS AND A PREDETERMINED LOWER SHADE VALUE FOR VISIBLE RAYS, SAID MASTER PLATE HAVING SPACED APART INDICIA ARRANGE ALONG ONE EDGE THEREOF RESPECTIVELY INDICATING DESIRED ULTIMATE SHADES FOR VISIBLE RAYS, A PLURALITY OF TRANSPARENT SYNTHETIC PLASTIC COLORED AUXILIARY PLATES FOR FILTERING PRINCIPALLY VISIBLE RAYS AND ALSO INFRARED AND ULTRAVIOLET RAYS, SAID AUXILIARY PLATES HAVING RESPECTIVELY DIFFERENT PREDETERMINED SHADE VALUES FOR VISIBLE RAYS AND HAVING NOTCHES SPACED ALONG ONE EDGE THEREOF RESPECTIVELY IN ACCORDANCE WITH THEIR SAID DIFFERENT SHADE VALUE, SAID MASTER AND SELECTED ONES OF SAID AUXILIARY PLATES UPON SUPERIMPOSITION PROVIDING A SELECTED ULTIMATE SHADE VALUE FOR VISIBLE RAYS AND AT LEAST SAID PREDETERMINED HIGH SAFE SHADE VALUE FOR INFRARED AND ULTRAVIOLET RAYS, AND SAID NOTCHES IN SAID SELECTED AUXILIARY PLATES COOPERATING WITH THE INDICIA ON THE MASTER PLATE FOR INDICATING THE ULTIMATE SHADE VALUE FOR VISIBLE RAYS PROVIDED BY THE SUPERIMPOSED MASTER AND SELECTED AUXILIARY PLATES.
Claim 2
Dependent Claim
195 words
A FILTER PLATE ASSEMBLY FOR WELDING HELMETS AND THE LIKE COMPRISING, A TRANSPARENT SYNTHETIC PLASTIC MASTER PLATE HAVING A THIN FILM OF METAL DEPOSITED THEREON FOR FILTERING PRINCIPALLY INFRARED AND ULTRAVIOLET RAYS AND ALSO VISIBLE RAYS AND HAVING A PREDETERMINED HIGH SAFE SHADE VALUE FOR INFRARED AND ULTRAVIOLET RAYS AND A PREDETERMINED LOWER SHADE VALUE FOR VISIBLE RAYS, SAID MASTER PLATE HAVING SPACED APART INDICIA ARRANGE ALONG ONE EDGE THEREOF RESPECTIVELY INDICATING DESIRED ULTIMATE SHADES FOR VISIBLE RAYS, A PLURALITY OF TRANSPARENT SYNTHETIC PLASTIC COLORED AUXILIARY PLATES FOR FILTERING PRINCIPALLY VISIBLE RAYS AND ALSO INFRARED AND ULTRAVIOLET RAYS, SAID AUXILIARY PLATES HAVING RESPECTIVELY DIFFERENT PREDETERMINED SHADE VALUES FOR VISIBLE RAYS AND HAVING NOTCHES SPACED ALONG ONE EDGE THEREOF RESPECTIVELY IN ACCORDANCE WITH THEIR SAID DIFFERENT SHADE VALUE, SAID MASTER AND SELECTED ONES OF SAID AUXILIARY PLATES UPON SUPERIMPOSITION PROVIDING A SELECTED ULTIMATE SHADE VALUE FOR VISIBLE RAYS AND AT LEAST SAID PREDETERMINED HIGH SAFE SHADE VALUE FOR INFRARED AND ULTRAVIOLET RAYS, AND SAID NOTCHES IN SAID SELECTED AUXILIARY PLATES COOPERATING WITH THE INDICIA ON THE MASTER PLATE FOR INDICATING THE ULTIMATE SHADE VALUE FOR VISIBLE RAYS PROVIDED BY THE SUPERIMPOSED MASTER AND SELECTED AUXILIARY PLATES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |