US3228865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing tetrafluoroethylene
Assignee: Dow Chemical Co
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Filing: 1963-11-29
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Granted: 1966-01-11
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Vogh James William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:03
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
IN A PROCESS FOR POLYMERIZING TETRAFLUOROETHYLENE, THE IMPROVEMENT WHICH CONSISTS IN SUBJECTING VAPORS OF TETRAFLUOROETHYLENE IN ADMIXTURE WITH NITROUS OXIDE TO THE ACTION OF ACTINIC LIGHT.
Claim 2
Dependent Claim
26 words
IN A PROCESS FOR POLYMERIZING TETRAFLUOROETHYLENE, THE IMPROVEMENT WHICH CONSISTS IN SUBJECTING VAPORS OF TETRAFLUOROETHYLENE IN ADMIXTURE WITH NITROUS OXIDE TO THE ACTION OF ACTINIC LIGHT.
References Cited (Backward Citations)
GB939096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |