US2559684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing red phosphorus
Assignee: Tennessee Valley Authority
•
Filing: 1949-04-27
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Granted: 1951-07-10
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Expires: 1969-04-27
Abstract
No abstract record available.
Inventors
- 👤 Skolnik Sol
- 👤 Grover L Bridger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:06
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/003; C01B25/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A PROCESS FOR STABILIZING FINELY DIVIDED RED PHOSPHORUS NORMALLY SUSCEPTIBLE TO IGNITION UNDER THE INFLUENCE OF IMPACT AND FRICTION WHICH COMPRISES ADMIXING SUCH RED PHOSPHORUS WITH A SMALL PROPORTION OF CONCENTRATED PHOSPHORUS ACID; DRYING THE RESULTING MIXTURE OF A LOW TEMPERATURE UNTIL SUBSTANTIALLY ALL UNCOMBINED MOISTURE IS REMOVED; AND MAINTAINING THE MIXTURE, CONSISTING OF FINE PARTICLES OF RED PHOSPHORUS HAVING THEIR SURFACES COATED WITH HIGHLY CONCENTRATED PHOSPHORUS ACID, IN A STATE OF APPARENT DRYNESS.
References Cited (Backward Citations)
US1880538A
Cited
US2399120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |