US2528454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating process
Assignee: Individual
•
Filing: 1946-11-07
•
Granted: 1950-10-31
•
Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 Hermann I Schlesinger
- 👤 George W Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/01; C23C16/22; C23C16/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A PROCESS FOR DEPOSITING BORON BY THERMAL DECOMPOSITION OF A VOLATILE HYDRIDE OF BORON, THE STEP OF CONTACTING A SURFACE WITH SAID HYDRIDE WHILE MAINTAINING SAID SURFACE WITHIN A TEMPERATURE RANGE OF FROM APPROXIMATELY 300*C. TO APPROXIMATELY 500*C. AND A MAXIMUM PRESSURE OF 150 MM. MERCURY WHEREBY A DEPOSIT OF AMORPHOUS HORON IS OBTAINED ON SAID SURFACE.
Claim 2
Dependent Claim
58 words
IN A PROCESS FOR DEPOSITING BORON BY THERMAL DECOMPOSITION OF A VOLATILE HYDRIDE OF BORON, THE STEP OF CONTACTING A SURFACE WITH SAID HYDRIDE WHILE MAINTAINING SAID SURFACE WITHIN A TEMPERATURE RANGE OF FROM APPROXIMATELY 300*C. TO APPROXIMATELY 500*C. AND A MAXIMUM PRESSURE OF 150 MM. MERCURY WHEREBY A DEPOSIT OF AMORPHOUS HORON IS OBTAINED ON SAID SURFACE.
References Cited (Backward Citations)
GB245753A
Cited
US1774410A
Cited
US1876229A
Cited
US1855562A
Cited
US2307005A
Cited
US2415946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |