US3394023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting water-repellent surfaces of plastic into water-attractive surfaces
Assignee: Thin Film Inc
•
Filing: 1967-02-09
•
Granted: 1968-07-23
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Expires: 1987-02-09
Abstract
No abstract record available.
Inventors
- 👤 George E Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/52; C23C18/18; C23C18/20; C23C18/22; C23C18/26; C23C18/48; C23C18/50; H; H01; H01F; H01F41/00; H01F41/14; H01F41/24
Claims Analysis
Total Claims: 0
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US3138479A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |