Patent US3148073A successfully refreshed from Google Patents.
US3148073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic glasses for use in welders' goggles
Assignee: PPG Industries Inc
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Filing: 1961-05-08
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Granted: 1964-09-08
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 John J Smith
- 👤 William J Englert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:36
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C1/00; C03C1/10; C03C3/00; C03C3/04; C03C3/076; C03C3/078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN INFRARED AND ULTRAVIOLET ABSORBING GLASS, WHICH AT ABOUT A 3 MILLIMETER THICKNESS TRANSMITS LESS THAN ABOUT 1 PERCENT OF THE TOTAL SOLAR UNTRAVIOLET ENERGY AND LESS THAN ABOUT 12 PERCENT OF THE SOLAR INFRARED ENERGY AND HAS A TRANSMITTANCE OF LESS THAN ABOUT 5.6 PERCENT AT A WAVELENGTH OF 600 MILLIMICRONS AND LESS THAN ABOUT 0.3 PERCENT AT A WAVELENGTH OF 750 MILLIMICRONS, CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN PERCENT BY WEIGHT: 63 TO 70 PERCENT SIO2, 15.5 TO 20 PERCENT ALKALI METAL OXIDES, 10 TO 15 PERCENT ZNO, 1.5 TO 4 PERCENT TIO2, 2.5 TO 4.5 PERCENT CUO AND 0.0025 TO 0.045 PERCENT COO, THE RATIO OF CUO TO COO BEING BETWEEN 1000:1 AND 100:1.
Claim 2
Dependent Claim
118 words
AN INFRARED AND ULTRAVIOLET ABSORBING GLASS, WHICH AT ABOUT A 3 MILLIMETER THICKNESS TRANSMITS LESS THAN ABOUT 1 PERCENT OF THE TOTAL SOLAR UNTRAVIOLET ENERGY AND LESS THAN ABOUT 12 PERCENT OF THE SOLAR INFRARED ENERGY AND HAS A TRANSMITTANCE OF LESS THAN ABOUT 5.6 PERCENT AT A WAVELENGTH OF 600 MILLIMICRONS AND LESS THAN ABOUT 0.3 PERCENT AT A WAVELENGTH OF 750 MILLIMICRONS, CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN PERCENT BY WEIGHT: 63 TO 70 PERCENT SIO2, 15.5 TO 20 PERCENT ALKALI METAL OXIDES, 10 TO 15 PERCENT ZNO, 1.5 TO 4 PERCENT TIO2, 2.5 TO 4.5 PERCENT CUO AND 0.0025 TO 0.045 PERCENT COO, THE RATIO OF CUO TO COO BEING BETWEEN 1000:1 AND 100:1.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |