Patent US3148620A successfully refreshed from Google Patents.
US3148620A
Expired / Lapsed
US
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Wear reduction additives
Assignee: Wegematic Corp
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Filing: 1961-05-29
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Granted: 1964-09-15
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 David E Jacobson
- 👤 Stig Y Ek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:59
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/24; F42B5/16; Y; Y10; Y10S; Y10S102/00; Y10S102/704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A CARTRIDGE HAVING A PROPELLANT CHARGE, A SINGLE PROJECTILE, AND AN ADDITIVE FOR REDUCING GUN BARREL WEAR UPON FIRING OF SAID CARTRIDGE, SAID ADITIVE COMPRISING: (A) A LAYER OF CARRIER MATERIAL DISPOSED AROUND SAID PROPELLANT CHARGE AND COMPRISED OF PARAFFIN HAVING A MELTING POINT BETWEEN 50 AND 100*C. AND ADAPTED TO PRODUCE RELATIVELY COOL GAS UPON FIRING OF SAID CHARGE; AND (B) FINELY DIVIDED PARTICLES OF TITANIUM DIOXIDE CONTAINED IN SAID LAYER OF PARAFFIN INA N AMOUNT SUFFICIENT TO PRODUCE A TEMPERATURE RESISTANT BARREL PROTECTOR UPON FIRING OF SAID CHARGE.
Claim 2
Dependent Claim
90 words
A CARTRIDGE HAVING A PROPELLANT CHARGE, A SINGLE PROJECTILE, AND AN ADDITIVE FOR REDUCING GUN BARREL WEAR UPON FIRING OF SAID CARTRIDGE, SAID ADITIVE COMPRISING: (A) A LAYER OF CARRIER MATERIAL DISPOSED AROUND SAID PROPELLANT CHARGE AND COMPRISED OF PARAFFIN HAVING A MELTING POINT BETWEEN 50 AND 100*C. AND ADAPTED TO PRODUCE RELATIVELY COOL GAS UPON FIRING OF SAID CHARGE; AND (B) FINELY DIVIDED PARTICLES OF TITANIUM DIOXIDE CONTAINED IN SAID LAYER OF PARAFFIN INA N AMOUNT SUFFICIENT TO PRODUCE A TEMPERATURE RESISTANT BARREL PROTECTOR UPON FIRING OF SAID CHARGE.
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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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |