Patent US3204558A successfully refreshed from Google Patents.
US3204558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear reduction additives
Assignee: Wegematic Corp
•
Filing: 1961-11-20
•
Granted: 1965-09-07
•
Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Jacobson David Esriel
- 👤 Ek Stig Yngve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:14
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/24; Y; Y10; Y10S; Y10S102/00; Y10S102/704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
FOR USE IN A GUN BARREL, IN COMBINATION: A SINGLE PROJECTILE; AN EXPLOSIVE CHARGE WHICH WHEN FIRED PRODUCES HOT PROPELLANT GASES FOR PROPELLING THE PROJECTILE THROUGH THE GUN BARREL; AND AN ADDITIVE FOR REDUCING GUN BARREL WEAR RESULTING FROM THE FIRING OF SUCH PROJECTILE COMPRISING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC COMPOUNDS PRESENT IN AN AMOUNT BETWEEN 0.05 AND 20% BY WEIGHT OF THE PROPELLANT CHARGE TO PROVIDE ON THE INSIDE SURFACE OF THE GUN BARREL A TEMPORARY PROTECTION HAVING A HIGH RESISTANCE TO TEMPERATURES AND WEAR.
Claim 2
Dependent Claim
92 words
FOR USE IN A GUN BARREL, IN COMBINATION: A SINGLE PROJECTILE; AN EXPLOSIVE CHARGE WHICH WHEN FIRED PRODUCES HOT PROPELLANT GASES FOR PROPELLING THE PROJECTILE THROUGH THE GUN BARREL; AND AN ADDITIVE FOR REDUCING GUN BARREL WEAR RESULTING FROM THE FIRING OF SUCH PROJECTILE COMPRISING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC COMPOUNDS PRESENT IN AN AMOUNT BETWEEN 0.05 AND 20% BY WEIGHT OF THE PROPELLANT CHARGE TO PROVIDE ON THE INSIDE SURFACE OF THE GUN BARREL A TEMPORARY PROTECTION HAVING A HIGH RESISTANCE TO TEMPERATURES AND WEAR.
References Cited (Backward Citations)
US943589A
Cited
US1187779A
Cited
US1316786A
Cited
US1336463A
Cited
US1957935A
Cited
US2299464A
Cited
US2159234A
Cited
US2131353A
Cited
US2309978A
Cited
US2301043A
Cited
US2604391A
Cited
US2637274A
Cited
US2744816A
Cited
US2701524A
Cited
US2989388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |