US2572248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method of making boron
Assignee: Individual
•
Filing: 1949-10-08
•
Granted: 1951-10-23
•
Expires: 1969-10-08
Abstract
No abstract record available.
Inventors
- 👤 Hugh S Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/34; C01; C01B; C01B35/00; C01B35/02; C01B35/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE PROCESS OF PREPARING BORON COMPRISING ELECTROLYZING A FUSED BATH CONSISTING ESSENTIALLY OF POTASSIUM CHLORIDE AND POTASSIUM FLUOBRORATE.
Claim 2
Dependent Claim
18 words
THE PROCESS OF PREPARING BORON COMPRISING ELECTROLYZING A FUSED BATH CONSISTING ESSENTIALLY OF POTASSIUM CHLORIDE AND POTASSIUM FLUOBRORATE.
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) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |