US1645086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for working quartz
Assignee: General Electric Co
•
Filing: 1923-09-20
•
Granted: 1927-10-11
•
Expires: 1943-09-20
Abstract
No abstract record available.
Inventors
- 👤 Edward R Berry
- 👤 Philip K Devers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:20
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/07; C03B23/047; C03B23/0476; Y; Y10; Y10S; Y10S65/00; Y10S65/08
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) | 1930-10-10 | 1931-04-11 | 1931-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-10 | 1935-04-11 | 1935-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-10 | 1939-04-11 | 1939-10-11 | $7700.00 | Window Closed / Lapsed |