US2697669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating paper with clay compositions
Assignee: Provincial Paper Ltd
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Filing: 1951-01-11
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Granted: 1954-12-21
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Expires: 1971-01-11
Abstract
No abstract record available.
Inventors
- 👤 Masterman Frederick Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:59
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/828; D21H19/10; D21H19/12; D21H19/36; D21H19/38; D21H19/40
Claims Analysis
Total Claims: 0
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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) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |