US3355752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping tool
Assignee: NAUTCHNO IZSLEDOVATELSKI I PK
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Filing: 1965-08-04
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Granted: 1967-12-05
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Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 Ilija S Haralampiev
- 👤 Assen A Valev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; B23G2210/00; B23G2210/36; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9046; Y10T408/90467; Y10T408/909; Y10T408/9095; Y10T408/9097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A TAPPING TOOL FOR THE CUTTING OF INTERNAL THREADS, COMPRISING AN ELONGATED SUBSTANTIALLY CYLINDRICAL BODY WITH SEVERAL PERIPHERALLY SPACED ROWS AT TEETH EXTENDING IN A GENERALLY LONGITUDINAL DIRECTION FROM ONE END OF SAID BODY TO THE OTHER, THE TEETH OF ADJACENT ROWS RESPECTIVELY COMPRISING TEETH OF A FIRST SHAPE AND TEETH OF A SECOND SHAPE ALTERNATING WITH MUTUAL PERIPHERAL SPACING ALONG A HELICOIDAL LINE, SAID FIRST SHAPE HAVING A STEPPED OUTLINE WITH A CENTRAL LAND RISING ABOVE A PAIR OF OUTER LANDS FLANKING SAID CENTRAL LAND, SAID SECOND SHAPE HAVING A SUBSTANTIALLY TRAPEZOIDAL OUTLINE OF A BASE WIDTH SUBSTANTIALLY
Claim 2
Dependent Claim
99 words
A TAPPING TOOL FOR THE CUTTING OF INTERNAL THREADS, COMPRISING AN ELONGATED SUBSTANTIALLY CYLINDRICAL BODY WITH SEVERAL PERIPHERALLY SPACED ROWS AT TEETH EXTENDING IN A GENERALLY LONGITUDINAL DIRECTION FROM ONE END OF SAID BODY TO THE OTHER, THE TEETH OF ADJACENT ROWS RESPECTIVELY COMPRISING TEETH OF A FIRST SHAPE AND TEETH OF A SECOND SHAPE ALTERNATING WITH MUTUAL PERIPHERAL SPACING ALONG A HELICOIDAL LINE, SAID FIRST SHAPE HAVING A STEPPED OUTLINE WITH A CENTRAL LAND RISING ABOVE A PAIR OF OUTER LANDS FLANKING SAID CENTRAL LAND, SAID SECOND SHAPE HAVING A SUBSTANTIALLY TRAPEZOIDAL OUTLINE OF A BASE WIDTH SUBSTANTIALLY
References Cited (Backward Citations)
CH72667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |