US2943971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmented paper and preparation
Assignee: —
•
Filing: —
•
Granted: 1960-07-05
•
Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:27
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/675; D21H17/68
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
40 words
PIGMENTED CELLULOISE PAPER OF ENCHANCED OPACITY PIGMENTED WITH INDEPENDENTLY PREPARED TITANUIM DIOXIDE AND A FLOCCULENT FINELY DIVIDED, PIGMENTARY, AMORPHOUS, PRECIPATED SILICEOUS MATERIAL HAVING AN AVERAGE ULTIMATE PARTICLE SIZE BELOW 1.0 MICRON AND CONTAINING AT LEAST 50 PERCENT SIO2 BY WEIGHT.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |