Patent US3371073A successfully refreshed from Google Patents.
US3371073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfonamides
Assignee: Dow Chemical Co
•
Filing: 1966-01-28
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Granted: 1968-02-27
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Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 Harry A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:23
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A SOLID POLYSULFONAMIDE HAVING A MOLECULAR STRUCTURE CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
15 words
A SOLID POLYSULFONAMIDE HAVING A MOLECULAR STRUCTURE CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |