US3672919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass having high absorption of infrared radiation
Assignee: Schott AG
•
Filing: 1969-09-19
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Granted: 1972-06-27
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Expires: 1989-09-19
Abstract
Abstract GLASS WHICH IS HEAT ABSORBING AND ELECTRICALLY HIGHLY INSULATING AND SUITABLE FOR SEALING OF ELEMENTS OF NICKELCHROMIUM-IRON AND NICKEL-MANGANESE-IRON ALLOYS CONTAINING IRON (II) OXIDE IN AN AMOUNT PROVIDING HIGH INFRARED ABSORPTION AT 1-2 UN. AND LESS THAN 20% BY WEIGHT OF PBO.
Inventors
- 👤 Werner Sack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:02
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C4/082; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C4/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |