US2863721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating mica
Assignee: General Electric Co
•
Filing: 1957-09-16
•
Granted: 1958-12-09
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Harold S Endicott
- 👤 George E Ledges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:32
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A METHOD OF TREATING PHLOGOPITE MICA FOR USE AS A DIELECTRIC MATERIAL WHICH COMPRISES HEATING SAID MICA TO A TEMPERATURE BETWEEN 850*C. AND 1050*C. FOR A PERIOD BETWEEN ONE HOUR AND SEVEN HOURS.
Claim 2
Independent Claim
33 words
A METHOD OF TREATING PHLOGOPITE MICA FOR USE AS A DIELECTRIC MATERIAL WHICH COMPRISES HEATING SAID MICA TO A TEMPERATURE BETWEEN 850*C. AND 1050*C. FOR A PERIOD BETWEEN ONE HOUR AND SEVEN HOURS.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |