US2787968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving frictional contact between metal surfaces normally in rolling contact and resultant structure
Assignee: ChampionX LLC
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Filing: 1955-09-08
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Granted: 1957-04-09
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Expires: 1975-09-08
Abstract
No abstract record available.
Inventors
- 👤 George W Luvisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:31
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE METHOD OF IMPROVING THE FRICTIONAL CONTACT BETWEEN TWO METAL SURFACES NORMALLY IN ROLLING CONTACT ONE WITH RESPECT TO THE OTHER WHICH COMPRISES APPLYING TO AT LEAST ONE OF SAID SURFACES A THIN COATING OF COLLODIAL
Claim 2
Independent Claim
36 words
THE METHOD OF IMPROVING THE FRICTIONAL CONTACT BETWEEN TWO METAL SURFACES NORMALLY IN ROLLING CONTACT ONE WITH RESPECT TO THE OTHER WHICH COMPRISES APPLYING TO AT LEAST ONE OF SAID SURFACES A THIN COATING OF COLLODIAL
References Cited (Backward Citations)
US1666167A
Cited
US2408656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |