Patent US4071275A successfully refreshed from Google Patents.
US3373077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble and fusible, heat resistant, chelate polymers
Assignee: Monsanto Research Corp
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Filing: 1963-06-07
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Granted: 1968-03-12
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 John J O'connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:41
CPC Classifications
C; C08; C08G; C08G79/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
CHELATED METAL POLYMERS CHARACTERIZED BY REPEATING UNITS OF THE FORMULA -O-AR1(-CH=N-R1)-X-AR2(-CH=N-R2)-O-M(II)WHERE X IS A LINKING UNIT, -AR1(-CH=)-O- AND -AR2(-CH=)-OARE O-HYDROXYARYLCARBOXALDEHYDE RESIDUES AND WHEREIN R1 AND R2 ARE ALIPHATIC GROUPS HAVING AT LEAST 4 CARBON ATOMS, =NR1 AND =NR2 ARE MONO-PRIMARY-AMINE RESIDUES AND MII IS A DIVALENT TETRACOORDINATED METAL ATOM.
Claim 2
Dependent Claim
49 words
CHELATED METAL POLYMERS CHARACTERIZED BY REPEATING UNITS OF THE FORMULA -O-AR1(-CH=N-R1)-X-AR2(-CH=N-R2)-O-M(II)WHERE X IS A LINKING UNIT, -AR1(-CH=)-O- AND -AR2(-CH=)-OARE O-HYDROXYARYLCARBOXALDEHYDE RESIDUES AND WHEREIN R1 AND R2 ARE ALIPHATIC GROUPS HAVING AT LEAST 4 CARBON ATOMS, =NR1 AND =NR2 ARE MONO-PRIMARY-AMINE RESIDUES AND MII IS A DIVALENT TETRACOORDINATED METAL ATOM.
Claim 3
Dependent Claim
12 words
THE POLYMERS OF CLAIM 1, WHEREIN SAID MII REPRESENTS A ZINC ATOM.
References Cited (Backward Citations)
US3023161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |