US3560249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of polytetra-fluoroethylene multilayer coatings on heat-resistant materials
Assignee: Individual
•
Filing: 1968-09-23
•
Granted: 1971-02-02
•
Expires: 1988-09-23
Abstract
Abstract A METHOD FOR THE PRODUCTION OF POLYTETRAFLUORETHYLENE MULTILAYER COATINGS ON A HEAT-RESISTANT MATERIALS WHICH COMPRISES DEPOSITING AN AQUEOUS DISPERSION OF POLYTETRAFLUOROETHYLENE ONTO SAID MATERIALS, FOLLOWED BY DRYING THE DEPOSITED DISPERSION LAYER AND BAKING THE RESULTANT LAYER OF THE POLYMER, WHEREIN IN THE COURSE OF DEPOSITING THE SECOND THE SUBSEQUENT LAYERS OF THE AQUEOUS DISPERSION AND/OR IMMEDIATELY PRIOR TO DISPERSION DEPOSITION THE SURFACE OF SAID MATERIALS IS RUBBED AGAINST A MATERIAL CAPABLE OF PRODUCING, ON FRICTION, A NEGATIVE ELECTROSTATIC CHARGE ON THE SURFACE OF POLYTETRAFLUOROETHYLENE.
Inventors
- 👤 Lev Vikentievich Chereshkevich
- 👤 Dmitry Dmitrievich Chegodaev
- 👤 Nadezhda Elizarovna Yavzina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:56
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |