Patent US2354431A successfully refreshed from Google Patents.
Patent US3067262A successfully refreshed from Google Patents.
US3067262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telomers of tetrafluoroethylene
Assignee: EIDP Inc
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Filing: 1961-05-10
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Granted: 1962-12-04
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Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Brady James Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:05
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
WAX-LIKE, NORMALY SOLID AND ESSENTIALLY NON-DISTILLABLE OPEN-CHAIN HIGHLY CRYSTALLINE REACTION PRODUCTS OF (1) ONE MOLE OF TETRAFLUOROETHYLENE, (2) A SOLUTION OF FROM 0.01 TO 0.6 MOLE OF AN ACTIVE TELOGEN IN FROM 1.7 TO 15 MOLES OF TRICHLOROTRIFLUOROETHANE AND (3) FROM 0.05 TO 3% BY WEIGHT, BASED IN SAID TETRAFLUOROETHYLENE, OF A FREE RADICAL GENERATING CATALYST, SAID REACTION PRODUCTS HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE 1300 TO 15,000, A CRYSTALLINE MELTING POINT IN THE RANGE 225* TO 320*C., SPECIFIC INFRARED RATIOS AT 3.4 MICRONS OF FROM 0.05 TO 3.5 AND AT 10.4 MICRONS OF FROM 0.05 TO 3.0, A CHLORINE CONTENT OF FROM 0.05% TO 2.0% BY WEIGHT, A HYDROGEN CONTENT OF FROM 0.05% TO 2.0% BY WEIGHT AND A LAMELLAR ARRANGEMENT OF SHEET-LIKE CRYSTALS.
Claim 2
Dependent Claim
128 words
WAX-LIKE, NORMALY SOLID AND ESSENTIALLY NON-DISTILLABLE OPEN-CHAIN HIGHLY CRYSTALLINE REACTION PRODUCTS OF (1) ONE MOLE OF TETRAFLUOROETHYLENE, (2) A SOLUTION OF FROM 0.01 TO 0.6 MOLE OF AN ACTIVE TELOGEN IN FROM 1.7 TO 15 MOLES OF TRICHLOROTRIFLUOROETHANE AND (3) FROM 0.05 TO 3% BY WEIGHT, BASED IN SAID TETRAFLUOROETHYLENE, OF A FREE RADICAL GENERATING CATALYST, SAID REACTION PRODUCTS HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE 1300 TO 15,000, A CRYSTALLINE MELTING POINT IN THE RANGE 225* TO 320*C., SPECIFIC INFRARED RATIOS AT 3.4 MICRONS OF FROM 0.05 TO 3.5 AND AT 10.4 MICRONS OF FROM 0.05 TO 3.0, A CHLORINE CONTENT OF FROM 0.05% TO 2.0% BY WEIGHT, A HYDROGEN CONTENT OF FROM 0.05% TO 2.0% BY WEIGHT AND A LAMELLAR ARRANGEMENT OF SHEET-LIKE CRYSTALS.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |