US3404433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion coating equipment
Assignee: WR Grace and Co
•
Filing: 1966-09-27
•
Granted: 1968-10-08
•
Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Charles M Krutchen
- 👤 Kenneth E Sheets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:42
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/04; D06B3/045; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/06; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1633620A
Cited
US2522364A
Cited
US2488576A
Cited
US2698965A
Cited
US2902754A
Cited
US3058493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |