Patent US3697371A successfully refreshed from Google Patents.
US3697371A
Expired / Lapsed
US
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Capsule-fiber unit manufacture
Assignee: Appvion LLC
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Filing: 1971-02-12
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Granted: 1972-10-10
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Expires: 1991-02-12
Abstract
Abstract A PROCESS OF MANUFACTURE OF MINUTE CAPSULE-FIBER UNITS, EN MASSE, COMPRISING THE STEPS OF (1) DISPERSING CELLULOSE FIBERS AND OIL MATERIAL AS DROPLETS IN AN AQUEOUS SOLUTION OF A FILM-FORMING POLYMERIC MATERIAL, (2) CHANGING THE CONDITIONS OF THE SOLUTION TO MAKE THE POLYMERIC MATERIAL LESS SOLUBLE SO AS TO GIVE AN EMERGENT COACERVATE PHASE OF POLYMERIC MATERIAL WHICH WRAPS THE OIL DROPLETS AND ATTACHES THEM TO THE FIBERS TO GIVE CAPSULE-FIBERS UNITS AND (3) HARDENING THE POLYMERIC MATERIAL OF THE CAPSULEFIBER UNITS. D R A W I N G
Inventors
- 👤 Lowell Schleicher
- 👤 Robert E Miller
- 👤 Erland C Porter Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:23
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; B41; B41M; B41M5/00; B41M5/124; B41M5/165; D; D21; D21F; D21F11/00; D21F11/02; D21F11/04; D21H; D21H11/00; D21H19/00; D21H19/10; D21H27/00; D21H27/30; D21H27/38; D21H11/16; D21H13/00; D21H13/10; D21H13/12; D21H13/18; D21H13/20; D21H13/24; D21H13/26; D21H21/00; D21H21/14; D21H21/16; D21H21/50; D21H21/52; D21H21/54; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |