US2497387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fuse powder and fuses
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1944-10-06
•
Granted: 1950-02-14
•
Expires: 1964-10-06
Abstract
No abstract record available.
Inventors
- 👤 Zenftman Henryk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
C; C06; C06C; C06C5/00; C06B; C06B33/00; C06B33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
FUSE COMPOSITIONS COMPRISING A PULVERULENT MIXTURE OF POTASSIUM NITRATE, RED LEAD AND SILICON, WHEREIN THE PROPORTIONS BY WEIGHT OF THE INGREDIENTS IN THE ORDER NAMED LIE BETWEEN 50-15% 30-60% AND 10-40%, RESPECTIVELY.
Claim 2
Dependent Claim
32 words
FUSE COMPOSITIONS COMPRISING A PULVERULENT MIXTURE OF POTASSIUM NITRATE, RED LEAD AND SILICON, WHEREIN THE PROPORTIONS BY WEIGHT OF THE INGREDIENTS IN THE ORDER NAMED LIE BETWEEN 50-15% 30-60% AND 10-40%, RESPECTIVELY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |