Patent US3265679A successfully refreshed from Google Patents.
US3265679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical product and method for its manufacture
Assignee: Pennwalt Corp
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Filing: 1963-09-19
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Granted: 1966-08-09
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Iii Matthew B Black
- 👤 Ellsworth E Faust
- 👤 William S Barnhart
- 👤 Netsch Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:38
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B9/00; C08J3/124; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FREE FLOWING GRANULAR POLYTETRAFLUOROETHYLENE MOLDING POWER COMPRISED OF GLOMULES OF PARTICLES OF A FINELY PULVERIZED GRANULAR POLYETRAFLUOROETHYLENE POWDER HAVING AN AIR SEDIMENTATION SIZES OF LESS THAN 100 MICRONS, SAID GLOMULES HAVING A DRY SIEVE SIZE IN THE RANGE OF FROM 300 TO 3000 MICRONS; A BULK DENSITY IN THE RANGE OF FROM 400 TO 850 GRAMS PER LITER; AN UNCOMPACTED FLOW RATING OF AT LEAST 25; A COMPACTED FLOW RATING OF AT LEAST 9; SAID GLOMULES BEING SUFFICIENTLY HARD TO WITHSTAND NORMAL HANDLING WITHOUT DISINTEGRATION BUT READILY DEFORMABLE UNDER PERFORMING PRESSURES TO PRODUCE ESSENTIALLY PORE FREE MOLDINGS RETAINING AT LEAST 80% OF THE TENSILE STRENGTH OF MOLDINGS PRODUCED FROM THE ORIGINAL FINELY PULVERIZED POWDER.
Claim 2
Dependent Claim
115 words
A FREE FLOWING GRANULAR POLYTETRAFLUOROETHYLENE MOLDING POWER COMPRISED OF GLOMULES OF PARTICLES OF A FINELY PULVERIZED GRANULAR POLYETRAFLUOROETHYLENE POWDER HAVING AN AIR SEDIMENTATION SIZES OF LESS THAN 100 MICRONS, SAID GLOMULES HAVING A DRY SIEVE SIZE IN THE RANGE OF FROM 300 TO 3000 MICRONS; A BULK DENSITY IN THE RANGE OF FROM 400 TO 850 GRAMS PER LITER; AN UNCOMPACTED FLOW RATING OF AT LEAST 25; A COMPACTED FLOW RATING OF AT LEAST 9; SAID GLOMULES BEING SUFFICIENTLY HARD TO WITHSTAND NORMAL HANDLING WITHOUT DISINTEGRATION BUT READILY DEFORMABLE UNDER PERFORMING PRESSURES TO PRODUCE ESSENTIALLY PORE FREE MOLDINGS RETAINING AT LEAST 80% OF THE TENSILE STRENGTH OF MOLDINGS PRODUCED FROM THE ORIGINAL FINELY PULVERIZED POWDER.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |