Patent US3189401A successfully refreshed from Google Patents.
US3189401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous aldehyde, chrome and aromatic alcohol or quinone tannage of spun collagen fiber
Assignee: Ethicon Inc
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Filing: 1963-05-29
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Granted: 1965-06-15
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest J Griset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:23
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A METHOD OF TANNING COLLAGEN THAT HAS BEEN ACIDSWOLLEN, EXTRUDED AND RECONSTITUTED; THE STEPS OF CONTACTING SAID COLLAGEN WITH A SOLUTION CONTAINING AN ALDEHYDE, A BASIC TRIVALENT CHROMIUM SALT AND AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOCYCLIC AND DICYCLIC POLYHYDRIC PHENOLS, AND MONOCYCLIC, DICYCLIC AND TRICYCLIC QUINONES.
Claim 2
Dependent Claim
51 words
IN A METHOD OF TANNING COLLAGEN THAT HAS BEEN ACIDSWOLLEN, EXTRUDED AND RECONSTITUTED; THE STEPS OF CONTACTING SAID COLLAGEN WITH A SOLUTION CONTAINING AN ALDEHYDE, A BASIC TRIVALENT CHROMIUM SALT AND AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOCYCLIC AND DICYCLIC POLYHYDRIC PHENOLS, AND MONOCYCLIC, DICYCLIC AND TRICYCLIC QUINONES.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |