US2599092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple layer paper containing pigmented pulp and method of making
Assignee: Vanderbilt Chemicals LLC
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Filing: 1946-04-30
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Granted: 1952-06-03
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Expires: 1966-04-30
Abstract
No abstract record available.
Inventors
- 👤 Craig William Lutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:41
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/70; D21H17/67; D21H17/675
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A COMPOSITE MULTI-LAYER SHEET OF PAPER HAVING AN OUTER OR SURFACE COATING LAYER FORMED OF HIGHLY PIGMENTED AND GELATINIZED CELLULOSIC FIBERS CONTAINING AN AMOUNT OF FINELY-DIVIDED PRECIPITATED CALCIUM COMPOUND PIGMENT IN EXCESS OF THE DRY WEIGHT OF THE FIBERS, SAID GELATINIZED AND PIGMENTED FIBERS HAVING BEEN PRODUCED FROM SWOLLEN, HYDRATED AND GALATINIZED CELLULOSIC FIBERS CONTAINING A SOLUBLE SALT LARGELY WITHIN THE FIBERS BY REACTION OF ANOTHER SOLUBLE SALT THEREWITH TO FORM THE PRECIPITATED CALCIUM COMPOUND PIGMENT LARGELY WITHIN THE FIBERS AS WELL AS ON THE FIBERS.
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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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |