US2919219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low friction laminated phenolic bearing materials
Assignee: Individual
•
Filing: 1955-12-30
•
Granted: 1959-12-29
•
Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Watt V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:04
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/28; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/911; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/24479; Y10T428/24488; Y10T428/24777; Y10T428/24785; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF MAKING A SELF-LUBRICATING BEARING COMPRISING THE STEPS OF PLACING A PLURALITY OF LAYERS OF WOVEN FABRIC IN SURFACE CONTACT WITH ONE ANOTHER, EACH OF SAID LAYERS OF FABRIC BEING WOVEN OF A PLURALITY OF THREADS, CERTAIN ONLY OF SAID THREADS BEING MADE OF POLYTETRAFLUOROETHYLENE, SAID LAYERS BEING SO ARRANGED THAT THE TREADS OF POLYFLUOROTETRAETHYLENE IN ONE LAYER ARE DIAGONALLY SPACED FROM THOSE IN ADJACENT LAYERS, BONDING SAID LAYERS TOGETHER, MACHINING A SURFACE OF THE RESULANT PRODUCT AT RIGHT ANGLES TO THE DIRECTION OF THE THREADS OF POLYFLUOROTETRAETHYLENE, SO AS TO PROVIDE A BEARING SURFACE.
Claim 2
Independent Claim
97 words
THE METHOD OF MAKING A SELF-LUBRICATING BEARING COMPRISING THE STEPS OF PLACING A PLURALITY OF LAYERS OF WOVEN FABRIC IN SURFACE CONTACT WITH ONE ANOTHER, EACH OF SAID LAYERS OF FABRIC BEING WOVEN OF A PLURALITY OF THREADS, CERTAIN ONLY OF SAID THREADS BEING MADE OF POLYTETRAFLUOROETHYLENE, SAID LAYERS BEING SO ARRANGED THAT THE TREADS OF POLYFLUOROTETRAETHYLENE IN ONE LAYER ARE DIAGONALLY SPACED FROM THOSE IN ADJACENT LAYERS, BONDING SAID LAYERS TOGETHER, MACHINING A SURFACE OF THE RESULANT PRODUCT AT RIGHT ANGLES TO THE DIRECTION OF THE THREADS OF POLYFLUOROTETRAETHYLENE, SO AS TO PROVIDE A BEARING SURFACE.
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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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |