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Patent 1023731 Summary

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Claims and Abstract availability

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(12) Patent: (11) CA 1023731
(21) Application Number: 1023731
(54) English Title: APPARATUS FOR DRILLING HOLES IN EARTH SURFACE
Status: Term Expired - Post Grant Beyond Limit
Bibliographic Data
(51) International Patent Classification (IPC):
  • E21B 7/18 (2006.01)
(72) Inventors :
  • TSIFEROV, MIKHAIL I.
(73) Owners :
  • TSENTRALNY GEOFIZICHESKY TREST
(71) Applicants :
(74) Agent:
(74) Associate agent:
(45) Issued: 1978-01-03
(22) Filed Date:
Availability of licence: N/A
Dedicated to the Public: N/A
(25) Language of filing: English

Patent Cooperation Treaty (PCT): No

(30) Application Priority Data: None

Abstracts

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Claims

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Description

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Representative Drawing

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Administrative Status

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Event History

Description Date
Inactive: IPC from PCS 2011-08-12
Inactive: First IPC from PCS 2011-08-12
Inactive: Expired (old Act Patent) latest possible expiry date 1995-01-03
Grant by Issuance 1978-01-03

Abandonment History

There is no abandonment history.

Owners on Record

Note: Records showing the ownership history in alphabetical order.

Current Owners on Record
TSENTRALNY GEOFIZICHESKY TREST
Past Owners on Record
MIKHAIL I. TSIFEROV
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.
Documents

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Document
Description 		 Date
(yyyy-mm-dd) 		 Number of pages   Size of Image (KB) 
Cover Page 1994-05-04 1 12
Claims 1994-05-04 3 102
Abstract 1994-05-04 1 34
Drawings 1994-05-04 4 86
Descriptions 1994-05-04 27 913