Patent US4769691A successfully refreshed from Google Patents.
Patent US3737410A successfully refreshed from Google Patents.
US3737410A
Expired / Lapsed
US
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Method of zinc-modified resin manufacture by reacting novolaks with zinc dibenzoate
Assignee: Appvion LLC
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Filing: 1971-08-05
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Granted: 1973-06-05
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Expires: 1991-08-05
Abstract
Abstract A METHOD (AND PRODUCT THEREFORM) OF MANUFACTURING ZINC-MODIFIED PHENOL-FORMALDEHYDE NOVOLAK RESINS FOR USE AS COLOR-DEVELOPING MATERIALS IN PRESSURE-SENSITIVE RECORD SHEET MATERIAL. THE METHOD INVOLVES THE USE OF ZINC DIBENZOATE AND A WEAK BASE, FOR TREATMENT OF THE CHOSEN NOVOLAK IN A HOT MELT REACTION.
Inventors
- 👤 H Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:06
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; C; C08; C08G; C08G8/00; C08G8/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |