US2184078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sintering finely divided fluorspar
Assignee: Individual
•
Filing: 1938-09-22
•
Granted: 1939-12-19
•
Expires: 1958-09-22
Abstract
No abstract record available.
Inventors
- 👤 Reed W Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:33
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/076; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/24; C22B1/2406; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1942-12-18 | 1943-06-19 | 1943-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-18 | 1947-06-19 | 1947-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-18 | 1951-06-19 | 1951-12-19 | $7700.00 | Window Closed / Lapsed |