US2971908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reinforcing polytetra-fluoroethylene resin
Assignee: W S SHAMBAN AND Co
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Filing: 1957-08-15
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Granted: 1961-02-14
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Expires: 1977-08-15
Abstract
No abstract record available.
Inventors
- 👤 Chaffin Frank Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:52
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/58; C; C08; C08K; C08K3/00; C08K3/38; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2709/00; B29K2709/02; B29K2709/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR FORMING A COMPOSITION OF MATTER WHICH INCLUDES POLYTETRAFLUOROETHYLENE RESIN AND A FILLER OF BORON NITRIDE, THE PROCESS COMPRISING, GRINDING A SELECTED QUANTITY OF POLYTETRAFLUOROETHYLENE RESIN AND A PROPORTIONATE QUANTITY OF 5%-25% BY WEIGHT OF BORON NITRIDE TO A POWDER AT A REDUCED TEMPERATURE OF THE ORDER OF -250 DEGREES FAHRENHEIT IN A LIQUEFIED INERT GAS AND INTIMATELY INTERMIXING THE SAME, AND PERMITTING THE RESULTING MIXTURE TO RISE TO ROOM TEMPERATURE.
Claim 2
Dependent Claim
73 words
A PROCESS FOR FORMING A COMPOSITION OF MATTER WHICH INCLUDES POLYTETRAFLUOROETHYLENE RESIN AND A FILLER OF BORON NITRIDE, THE PROCESS COMPRISING, GRINDING A SELECTED QUANTITY OF POLYTETRAFLUOROETHYLENE RESIN AND A PROPORTIONATE QUANTITY OF 5%-25% BY WEIGHT OF BORON NITRIDE TO A POWDER AT A REDUCED TEMPERATURE OF THE ORDER OF -250 DEGREES FAHRENHEIT IN A LIQUEFIED INERT GAS AND INTIMATELY INTERMIXING THE SAME, AND PERMITTING THE RESULTING MIXTURE TO RISE TO ROOM TEMPERATURE.
References Cited (Backward Citations)
US2788324A
Cited
US2752321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |