Patent US3222298A successfully refreshed from Google Patents.
US3222298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic polymer
Assignee: Pennwalt Corp
•
Filing: 1963-03-04
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Granted: 1965-12-07
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Block Burton Peter
- 👤 Simkin Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:58
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/40; C; C08; C08G; C08G79/00; C08G79/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A POLYMER HAVING AN INORGANIC BACKBONE CONSISTING OF ZINC, OXYGEN AND PHOSPHORUS ATOMS CONSISTING OF REPEATING UNITS OF THE FORMULA
Claim 2
Dependent Claim
20 words
A POLYMER HAVING AN INORGANIC BACKBONE CONSISTING OF ZINC, OXYGEN AND PHOSPHORUS ATOMS CONSISTING OF REPEATING UNITS OF THE FORMULA
Claim 3
Dependent Claim
12 words
THE PROCESS OF REACTING 2,2''-IMINODIPYRIDINEDIACETATOZINC (II) AND A PHOSPHONIC ACID OF STRUCTURE
Claim 4
Dependent Claim
12 words
THE PROCESS OF REACTING 2,2''-IMINODIPYRIDINEDIACETATOZINC (II) AND A PHOSPHONIC ACID OF STRUCTURE
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |