US3500517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for fibrillating and crimping films
Assignee: Shell USA Inc
•
Filing: 1968-03-20
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Granted: 1970-03-17
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Expires: 1988-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jan Dekker
- 👤 Gerrit Schuur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; B; B26; B26F; B26F1/00; B26F1/02; B26F1/14; B26F1/18; B26F1/20; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10T; Y10T225/00; Y10T225/10; Y10T225/14; Y10T83/00; Y10T83/02; Y10T83/0237
Claims Analysis
Total Claims: 0
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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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |