Patent US2566902A successfully refreshed from Google Patents.
US2566902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous material and method of making
Assignee: General Electric Co
•
Filing: 1948-06-29
•
Granted: 1951-09-04
•
Expires: 1968-06-29
Abstract
No abstract record available.
Inventors
- 👤 Frank L Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:31
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/004; C04; C04B; C04B32/00; C04B32/005; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/085; C03C2214/00; C03C2214/04; C04B2111/00; C04B2111/90; C04B2111/92
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A VITREOUS ELECTRICAL INSULATING MATERIAL COMPRISING 50% TO 85% MICA AND 15% TO 50% BY WEIGHT OF A BINDER COMPRISING THE VITRIFIED PRODUCT OF A MIXTURE CONSISTING BY WEIGHT OF FROM 11% OF 21% ALUMINUM TRIHYDRATE, 7% TO 21% OF A CARBONATE SELECTED FROM THE CLASS CONSISTING OF BARIUM AND STRONTIUM CARBONATES, 37% TO 67% BORIC ACID AND 10% TO 32% CRYOLITE.
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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |