Patent US3259600A successfully refreshed from Google Patents.
US3259600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous solutions of metal coordination complexes of cationic thermosetting polyamido-polyamineepichlorohydrin wet strength resins
Assignee: Wyeth Holdings LLC
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Filing: 1965-09-09
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Granted: 1966-07-05
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Expires: 1985-09-09
Abstract
No abstract record available.
Inventors
- 👤 Coscia Anthony Thomas
- 👤 Williams Laurence Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:11
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AN AQUEOUS SOLUTION OF A METAL COORDINATION COMPLEX OF A WATER-SOLUBLE CATIONIC THERMOSETTING POLYAMIDOPOLYAMINE-EPICHLOROHYDRIN WET-STRENGTH POLYMER, THE WEIGHT OF SAID POLYMER BEING MORE THAN 10% OF THE WEIGHT OF SAID SOLUTION, THE METAL OF SAID COMPLEX HAVING A CHARGE DENSITY GREATER THAN THAT OF SODIUM.
Claim 2
Dependent Claim
45 words
AN AQUEOUS SOLUTION OF A METAL COORDINATION COMPLEX OF A WATER-SOLUBLE CATIONIC THERMOSETTING POLYAMIDOPOLYAMINE-EPICHLOROHYDRIN WET-STRENGTH POLYMER, THE WEIGHT OF SAID POLYMER BEING MORE THAN 10% OF THE WEIGHT OF SAID SOLUTION, THE METAL OF SAID COMPLEX HAVING A CHARGE DENSITY GREATER THAN THAT OF SODIUM.
References Cited (Backward Citations)
US2422666A
Cited
US2926154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |