US3582464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of rosin anhydride and their use as sizing agents for paper
Assignee: Hercules LLC
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Filing: 1967-04-10
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Granted: 1971-06-01
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Expires: 1987-04-10
Abstract
Abstract AQUEOUS DISPERSIONS OF ROSIN ANHYDRIDE, HAVING UTILITY AS SIZING AGENTS FOR PAPER, ARE PREPARED. THE ROSIN ANHYDRIDE IS PREPARED BY REACTION OF ROSIN AND ACETIC ANHYDRIDE.
Inventors
- 👤 Paul H Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:50
CPC Classifications
C; C08; C08L; C08L93/00; C08L93/04; D; D21; D21H; D21H17/00; D21H17/62
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |