Patent US342900A successfully refreshed from Google Patents.
Patent US3236808A successfully refreshed from Google Patents.
US3236808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfonate copolymers
Assignee: GE Chemicals Inc
•
Filing: 1961-01-03
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Granted: 1966-02-22
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
- 👤 Scardiglia Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:56
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/24; Y; Y10; Y10S; Y10S525/00; Y10S525/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A LINEAR POLYMERIC COMPOSITION HAVING AN INTRINSIC VISCOSITY IN EXCESS OF 0.3 DL./G. WHEN MEASURE IN METHYLENE CHLORIDE AT A TEMPERATURE OF 20*C. AND A SOFTENING TEMPERATURE IN EXCESS OF 97*C. COMPRISING IN ITS LINEAR CHAIN AT LEAST TWO DIFFERENT SULFONATE ESTER STRUCTURAL UNITS SELECTED FROM THE GROUP:
Claim 2
Dependent Claim
48 words
A LINEAR POLYMERIC COMPOSITION HAVING AN INTRINSIC VISCOSITY IN EXCESS OF 0.3 DL./G. WHEN MEASURE IN METHYLENE CHLORIDE AT A TEMPERATURE OF 20*C. AND A SOFTENING TEMPERATURE IN EXCESS OF 97*C. COMPRISING IN ITS LINEAR CHAIN AT LEAST TWO DIFFERENT SULFONATE ESTER STRUCTURAL UNITS SELECTED FROM THE GROUP:
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |