US2967797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming paper containing titanous hydroxide and product thereof
Assignee: Johnson and Johnson
•
Filing: 1956-12-10
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Granted: 1961-01-10
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Weschler
- 👤 Lagally Paul
- 👤 Lagally Herta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF FORMING A PAPER SHEET HAVING IMPROVED WET STRENGTH COMPRISING THE STEPS OF MIXING WITH A SLURRY OF PAPER PULP INCLUDING CELLULOSE FIBERS, A WATER SOLUBLE TRIVALENT TITANIUM SALT, HYDROLYZING SAID SALT TO FORM TI(OH)3, FORMING A PAPER WEB FROM SAID PULP AND DRYING SAID WEB TO FORM A PAPER SHEET.
Claim 2
Independent Claim
53 words
THE METHOD OF FORMING A PAPER SHEET HAVING IMPROVED WET STRENGTH COMPRISING THE STEPS OF MIXING WITH A SLURRY OF PAPER PULP INCLUDING CELLULOSE FIBERS, A WATER SOLUBLE TRIVALENT TITANIUM SALT, HYDROLYZING SAID SALT TO FORM TI(OH)3, FORMING A PAPER WEB FROM SAID PULP AND DRYING SAID WEB TO FORM A PAPER SHEET.
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |