US3384536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming fibrous sheets containing limited penetration of additaments within the sheet and sheets thereof
Assignee: Appvion LLC
•
Filing: 1965-03-24
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Granted: 1968-05-21
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Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 Robert W Sandberg
- 👤 Bruce W Brockett
- 👤 Donald B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/50; D21H21/52; D21H21/54; B; B01; B01J; B01J13/00; B01J13/02; B01J13/025; B41; B41M; B41M5/00; B41M5/124; B41M5/165; D21F; D21F5/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |