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Patent US3328357A successfully refreshed from Google Patents.
US3328357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-hydroxymaleimide copolymers
Assignee: Dow Chemical Co
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Filing: 1964-06-03
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Granted: 1967-06-27
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Sherman C Lashua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:48
CPC Classifications
C; C08; C08F; C08F8/00; C08F2800/00; C08F2800/10; C08F2800/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE RESINOUS POLYMER OF THE FORMULA:
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE RESINOUS POLYMER OF THE FORMULA:
Claim 3
Dependent Claim
42 words
THE METAL SALTS OF THE POLYMER OF CLAIM 1 WHICH ARE THE PRODUCT OF THE PROCESS OF ADDING A WATER-SOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, TIN, COBALT, IRON AND BARIUM TO THE POLYMER OF CLAIM 1.
References Cited (Backward Citations)
US3030339A
Cited
US3044992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |