Patent US2827425A successfully refreshed from Google Patents.
US3483014A
Expired / Lapsed
US
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Process for impregnating paper with ph controlled latex
Assignee: WR Grace and Co
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Filing: 1966-07-26
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Granted: 1969-12-09
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Expires: 1986-07-26
Abstract
No abstract record available.
Inventors
- 👤 Philip K Isaacs
- 👤 James L Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:59
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA69470A
Cited
US2422573A
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US2416272A
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US2406453A
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US2919205A
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US3078181A
Cited
US2950214A
Cited
US3262811A
Cited
US3282724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |