US3424830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding hollow,shaped articles of polytetrafluoroethylene
Assignee: Montedison SpA
•
Filing: 1965-08-12
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Granted: 1969-01-28
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Pierluigi Sfondrini
- 👤 Giovanni Convalle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C33/52; B29C33/48; B29C33/50; B29C33/505; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2105/00; B29K2105/25; B29K2105/251; B29L; B29L2031/00; B29L2031/712; B29L2031/7158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929109A
Cited
US3015855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |