Patent US34742A successfully refreshed from Google Patents.
Patent US3063373A successfully refreshed from Google Patents.
US3063373A
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Method of blasting
Assignee: Hercules Powder Co
•
Filing: 1959-06-08
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Granted: 1962-11-13
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Boddorff
- 👤 Robert W Lawrence
- 👤 Roth Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:42
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/24; F42D1/28; F42D1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A METHOD FOR BLASTING COAL DEPOSITS WHICH COMPRISES FORMING AN ELONGATED BOREHOLE IN A COAL DEPOSIT, INTRODUCING INTO SAID BOREHOLE, AS ELEMENTS OF A BLASTING
Claim 2
Independent Claim
25 words
A METHOD FOR BLASTING COAL DEPOSITS WHICH COMPRISES FORMING AN ELONGATED BOREHOLE IN A COAL DEPOSIT, INTRODUCING INTO SAID BOREHOLE, AS ELEMENTS OF A BLASTING
References Cited (Backward Citations)
USRE20412E
Cited
US1042643A
Cited
US1473596A
Cited
US2034568A
Cited
US2316596A
Cited
US2816071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |