Patent US2254642A successfully refreshed from Google Patents.
Patent US3238871A successfully refreshed from Google Patents.
US3238871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable time delay explosive charge element
Assignee: Pan American Petroleum Corp
•
Filing: 1963-11-12
•
Granted: 1966-03-08
•
Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Harold M Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:35
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ADJUSTABLE TIME-DELAY ELEMENT FOR USE IN THE GENERATION OF SEISMIC WAVE SIGNALS WHICH ELEMENT COMPRISES A MANDREL, A LENGTH OF LINEAR EXPLOSIVE EXTENDING ALONG SAID MANDREL, SAID LINEAR EXPLOSIVE BEING IN THE FORM OF A U-SHAPED CONFIGURATION WITH THE LEGS THEREOF EXTENDING ALONG SAID MANDREL SUBSTANTIALLY PARALLEL TO ONE ANOTHER, A CARRIAGE MEMBER INTERCONNECTING SAID LEGS AND SLIDABLE ALONG THE LENGTH THEREOF, AND AN EXPLOSIVE BRIDGE COMPONENT CARRIED ON SAID CARRIAGE IN DETONATING CONTACT WITH BOTH OF SAID LEGS, AND MEANS FOR MOVING SAID CARRIAGE MEMBER ALONG SAID MANDREL TO VARY THE DETONATION PATH ALONG SAID LINEAR EXPLOSIVE, WHEREBY THE TOTAL TIME REQUIRED FOR DETONATION MAY BE VARIED.
Claim 2
Dependent Claim
109 words
AN ADJUSTABLE TIME-DELAY ELEMENT FOR USE IN THE GENERATION OF SEISMIC WAVE SIGNALS WHICH ELEMENT COMPRISES A MANDREL, A LENGTH OF LINEAR EXPLOSIVE EXTENDING ALONG SAID MANDREL, SAID LINEAR EXPLOSIVE BEING IN THE FORM OF A U-SHAPED CONFIGURATION WITH THE LEGS THEREOF EXTENDING ALONG SAID MANDREL SUBSTANTIALLY PARALLEL TO ONE ANOTHER, A CARRIAGE MEMBER INTERCONNECTING SAID LEGS AND SLIDABLE ALONG THE LENGTH THEREOF, AND AN EXPLOSIVE BRIDGE COMPONENT CARRIED ON SAID CARRIAGE IN DETONATING CONTACT WITH BOTH OF SAID LEGS, AND MEANS FOR MOVING SAID CARRIAGE MEMBER ALONG SAID MANDREL TO VARY THE DETONATION PATH ALONG SAID LINEAR EXPLOSIVE, WHEREBY THE TOTAL TIME REQUIRED FOR DETONATION MAY BE VARIED.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |