US3549568A
Expired / Lapsed
US
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Aqueous starch-pigment paper coating compositions containing polyacrylamide-glyoxal latent insolubilizer
Assignee: Wyeth Holdings LLC
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Filing: 1968-05-21
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Granted: 1970-12-22
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Expires: 1988-05-21
Abstract
No abstract record available.
Inventors
- 👤 Anthony Thomas Coscia
- 👤 Daniel Dickerson Ritson
- 👤 Charles Frazier
- 👤 Joseph Hansbro Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:17
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; C; C08; C08F; C08F8/00; C08F8/28; C08F2800/00; C08F2800/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31765; Y10T428/31779; Y10T428/31783; Y10T428/31942; Y10T428/31949; Y10T428/31971; Y10T428/31975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2616818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |