US2719833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of processing polytetrafluorethylene and products therefrom
Assignee: BRITISH DIELECTRIC RES Ltd
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Filing: 1951-04-09
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Granted: 1955-10-04
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Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Vincent Russell Swale
- 👤 Burger Francis Joseph P Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26; B; B29; B29B; B29B13/00; B29B13/10; C08J11/00; C08J11/04; C08J11/06; C08J3/00; C08J3/12; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF REDUCING THE PARTICLE SIZE OF POLYTETRAFLUOROETHYLENE WHICH COMPRISES THE STEPS OF MIXING GRANULAR POLYTETRAFLUOROETHYLENE CONTAINING AT LEAST SOME PARTICLES HAVING A MAXIMUM DIMENSION ABOVE 0.5 MM. WITH A VISCO-ADHESIVE BINDER, THAT IS A BINDER CAPABLE OF WETTING BOTH THE MILLING SURFACES AND POLYTETRAFLUOROETHYLENE, CONTAINING POLYISOBUTYLENE, TO PRODUCE A PLASTIC MASS AND MILLING THIS MASS IN A RUBBER MILL WITH ROLLS RUNNING AT DESIRED EXTENT.
Claim 2
Independent Claim
67 words
A METHOD OF REDUCING THE PARTICLE SIZE OF POLYTETRAFLUOROETHYLENE WHICH COMPRISES THE STEPS OF MIXING GRANULAR POLYTETRAFLUOROETHYLENE CONTAINING AT LEAST SOME PARTICLES HAVING A MAXIMUM DIMENSION ABOVE 0.5 MM. WITH A VISCO-ADHESIVE BINDER, THAT IS A BINDER CAPABLE OF WETTING BOTH THE MILLING SURFACES AND POLYTETRAFLUOROETHYLENE, CONTAINING POLYISOBUTYLENE, TO PRODUCE A PLASTIC MASS AND MILLING THIS MASS IN A RUBBER MILL WITH ROLLS RUNNING AT DESIRED EXTENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |