Patent US4193655A successfully refreshed from Google Patents.
Patent US2978519A successfully refreshed from Google Patents.
US2978519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of
Assignee: —
•
Filing: —
•
Granted: 1961-04-04
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Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/12; 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
33 words
A PROCESS FOR THE MANUFACTURE OF FLUOROCARBON WAXES BY CRACKING POLYTETRAFLUOROETHYLENE, WHICH COMPRISES HEATING POLYTETRAFLUOROETHYLENE IN A SALT MELT HAVING A MELTING POINT BELOW 327*C. AT A TEMPERATURE WITHIN THE RANGE OF 300-600*C.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE MANUFACTURE OF FLUOROCARBON WAXES BY CRACKING POLYTETRAFLUOROETHYLENE, WHICH COMPRISES HEATING POLYTETRAFLUOROETHYLENE IN A SALT MELT HAVING A MELTING POINT BELOW 327*C. AT A TEMPERATURE WITHIN THE RANGE OF 300-600*C.
References Cited (Backward Citations)
US2551573A
Cited
US2664449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |