US3426684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear reduction additives
Assignee: Wegematic Corp
•
Filing: 1968-01-18
•
Granted: 1969-02-11
•
Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 David Esriel Jacobson
- 👤 Stig Yngve Ek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:28
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/04; F; F42; F42B; F42B5/00; F42B5/02; F42B5/24; Y; Y10; Y10S; Y10S102/00; Y10S102/704
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1005052A
Cited
US1187779A
Cited
US2050871A
Cited
US2159234A
Cited
US2131353A
Cited
US2301043A
Cited
US2744816A
Cited
US3009796A
Cited
US3209689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |