Patent US3419089A successfully refreshed from Google Patents.
US3419089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracer bullet, self-sealing
Assignee: Dresser Industries Inc
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Filing: 1966-05-20
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Granted: 1968-12-31
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Alexis A Venghiattis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:11
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROJECTILE FOR USE IN A BULLET WELL PERFORATING APPARATUS FOR FIRING A PROJECTILE INSIDE A WELL CASING, SAID PROJECTILE COMPRISING: A PROJECTILE FORMED OF A WELL-CASING-PIERCING NOSE PORTION DESIGNED TO PENETRATE THE WELL CASING, A FORWARD CYLINDRICAL PORTION EXTENDING REARWARD OF THE NOSE PORTION, A REAR CYLINDRICAL SEAL-FORMING PORTION OF A GREATER DIAMETER THAN THE FORWARD CYLINDRICAL PORTION, AND AN ANNULAR MALLEABLE SEAL MEMBER SURROUNDING THE FORWARD END OF THE FORWARD CYLINDRICAL PORTION WHEREBY UPON THE ANNULAR MALLEABLE SEAL MEMBER CONTACTING THE INNER WALL OF THE WELL CASING, IT REMAINS STATIONARY AGAINST THE INNER WALL AND WHEN THE REAR END FORMING PORTION OF THE PROJECTILE CONTACTS THE SEAL MEMBER, THE MALLEABLE MATERIAL FLOWS INTO THE PERFORATION FORMING A SEAL BETWEEN THE PROJECTILE AND THE PERFORATION.
Claim 2
Dependent Claim
126 words
A PROJECTILE FOR USE IN A BULLET WELL PERFORATING APPARATUS FOR FIRING A PROJECTILE INSIDE A WELL CASING, SAID PROJECTILE COMPRISING: A PROJECTILE FORMED OF A WELL-CASING-PIERCING NOSE PORTION DESIGNED TO PENETRATE THE WELL CASING, A FORWARD CYLINDRICAL PORTION EXTENDING REARWARD OF THE NOSE PORTION, A REAR CYLINDRICAL SEAL-FORMING PORTION OF A GREATER DIAMETER THAN THE FORWARD CYLINDRICAL PORTION, AND AN ANNULAR MALLEABLE SEAL MEMBER SURROUNDING THE FORWARD END OF THE FORWARD CYLINDRICAL PORTION WHEREBY UPON THE ANNULAR MALLEABLE SEAL MEMBER CONTACTING THE INNER WALL OF THE WELL CASING, IT REMAINS STATIONARY AGAINST THE INNER WALL AND WHEN THE REAR END FORMING PORTION OF THE PROJECTILE CONTACTS THE SEAL MEMBER, THE MALLEABLE MATERIAL FLOWS INTO THE PERFORATION FORMING A SEAL BETWEEN THE PROJECTILE AND THE PERFORATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |