US2624280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric initiator
Assignee: Hercules Powder Co
•
Filing: 1948-01-09
•
Granted: 1953-01-06
•
Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 David T Zebree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:50
CPC Classifications
C; C06; C06C; C06C7/00; F; F42; F42B; F42B3/00; F42B3/10; F42B3/12; F42B3/128; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/113
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN IGNITION COMPOSITION FOR BLASTING CAPS COMPRISING FROM ABOUT 10% TO ABOUT 20% OF FINELY-DIVIDED PRIMARY EXPLOSIVE; FROM ABOUT 50% TO ABOUT 70% OF A HEAT-PRODUCTING MATERIAL CONSISTING OF A FINELY-DIVIDED MIXTURE OF AT LEAST ONE NONMETALLIC MEMBER OF THE SULFUR GROUP WITH A SUBSTANTIALLY STOICHIOMETRIC PROPORTION OF
Claim 2
Dependent Claim
48 words
AN IGNITION COMPOSITION FOR BLASTING CAPS COMPRISING FROM ABOUT 10% TO ABOUT 20% OF FINELY-DIVIDED PRIMARY EXPLOSIVE; FROM ABOUT 50% TO ABOUT 70% OF A HEAT-PRODUCTING MATERIAL CONSISTING OF A FINELY-DIVIDED MIXTURE OF AT LEAST ONE NONMETALLIC MEMBER OF THE SULFUR GROUP WITH A SUBSTANTIALLY STOICHIOMETRIC PROPORTION OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |