Patent US2875183A successfully refreshed from Google Patents.
US2875183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous condensation product of a chlorinated aromatic disulfonyl halide and a diamine
Assignee: EIDP Inc
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Filing: 1955-06-30
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Granted: 1959-02-24
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Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 Wilbur A Murphey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:10
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A POLYSULFONAMIDE OF A DISULFONYL HALIDE AND A DIAMINE CONTAINING RECURRING UNITS OF THE STRUCTURE:
Claim 2
Dependent Claim
15 words
A POLYSULFONAMIDE OF A DISULFONYL HALIDE AND A DIAMINE CONTAINING RECURRING UNITS OF THE STRUCTURE:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |