US2807075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cemented chromium and chromium boride material and production thereof
Assignee: Borolite Corp
•
Filing: 1953-06-22
•
Granted: 1957-09-24
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Frank W Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:12
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0073; C22C29/00; C22C29/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A HARD BODY OF HIGH STRENGTH CONSISTING OF CEMENTED PARTICLES CONTAINING ESSENTIALLY 15% TO 45% OF CR2B AND 85% TO 55% OF A SUBSTANCE SELECTED FROM CR AND SI, SAID BODY BEING SUBSTANTIALLY FREE OF CRB, CRB2 AND CR3B2.
Claim 2
Dependent Claim
39 words
A HARD BODY OF HIGH STRENGTH CONSISTING OF CEMENTED PARTICLES CONTAINING ESSENTIALLY 15% TO 45% OF CR2B AND 85% TO 55% OF A SUBSTANCE SELECTED FROM CR AND SI, SAID BODY BEING SUBSTANTIALLY FREE OF CRB, CRB2 AND CR3B2.
References Cited (Backward Citations)
US2084349A
Cited
US2171391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |