US2772981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating composition
Assignee: NAT STARCH PRODUCTS Inc
•
Filing: 1953-03-17
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Granted: 1956-12-04
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 William F Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PAPER-COATING COMPOSITION COMPRISING A PAPER COATING PIGMENT SLIP HAVING AN ADDITIVE CONSISTING OF HEMICELLULOSE.
Claim 2
Dependent Claim
15 words
A PAPER-COATING COMPOSITION COMPRISING A PAPER COATING PIGMENT SLIP HAVING AN ADDITIVE CONSISTING OF HEMICELLULOSE.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |