Patent US2853475A successfully refreshed from Google Patents.
US2853475A
Expired / Lapsed
US
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Nu-chlorinated polysulfonamides
Assignee: EIDP Inc
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Filing: 1954-04-30
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Granted: 1958-09-23
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Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
- 👤 Wilbur A Murphey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:01
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/30; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN N-CHLORINATED POLYSULFONAMIDE CONDENSATION REACTION PRODUCT OF ABOUT 50 MOLE PERCENT OF A REACTANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC DIAMINES AND ALIPHATIC DIAMINES WITH AT LEAST TWO CARBON ATOMS, WITH ABOUT 50 MOLE PERCENT OF A REACTANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC DISULFONYL HALIDES, ALICYCLIC DISULFONYL HALIDES AND ALIPHATIC DISULFONYL HALIDES WITH AT LEAST TWO CARBON ATOMS IN WHICH THE SULFONIC RADICALS ARE SITUATED AT THE TERMINAL CARBON ATOMS, SAID REACTION PRODUCT BEING CHARACTERIZED BY HAVING AT LEAST FIVE PERCENT OF THE TOTAL AMIDE HYDROGEN SUBSTITUTED BY CHLORINE.
Claim 2
Dependent Claim
92 words
AN N-CHLORINATED POLYSULFONAMIDE CONDENSATION REACTION PRODUCT OF ABOUT 50 MOLE PERCENT OF A REACTANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC DIAMINES AND ALIPHATIC DIAMINES WITH AT LEAST TWO CARBON ATOMS, WITH ABOUT 50 MOLE PERCENT OF A REACTANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC DISULFONYL HALIDES, ALICYCLIC DISULFONYL HALIDES AND ALIPHATIC DISULFONYL HALIDES WITH AT LEAST TWO CARBON ATOMS IN WHICH THE SULFONIC RADICALS ARE SITUATED AT THE TERMINAL CARBON ATOMS, SAID REACTION PRODUCT BEING CHARACTERIZED BY HAVING AT LEAST FIVE PERCENT OF THE TOTAL AMIDE HYDROGEN SUBSTITUTED BY CHLORINE.
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |