US2745346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of charging holes with explosives
Assignee: Union Carbide Corp
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Filing: 1953-05-11
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Granted: 1956-05-15
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert B Aitchison
- 👤 Stanley B Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:51
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/10; Y; Y10; Y10S; Y10S102/00; Y10S102/705
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A METHOD OF CHARGING A BLAST HOLE WITH EXPLOSIVE COMPRISING INSERTING INTO SAID HOLE TO THE BOTTOM THEREOF AND ELONGATED COLLAPSED INFLATABLE EXPANSIBLE TUBE OF SUBSTANTIALLY IMPERVIOUS MATERIAL HAVING ITS LOWER END CLOSED OFF AND WEIGHTED, INFLATING SAID TUBE INTO CONTACT WITH THE SIDE WALLS OF SAID HOLE, AND THEN INTRODUCING A FREE FLOWING EXPLOSIVE INTO SAID INFLATED TUBE.
References Cited (Backward Citations)
US371298A
Cited
GB189718929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |