Patent US3228913A successfully refreshed from Google Patents.
US3228913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters of 4, 4'-dicarboxydiphenylsulfone with glycols and fibers thereof
Assignee: Honeywell International Inc
•
Filing: 1953-04-20
•
Granted: 1966-01-11
•
Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Nesty
- 👤 Leo J Spillane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:08
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE FIBER FORMING POLYMER ESTERS OF 4,4''-DICARBOXYDIPHENYLSULFONE WITH DIHYDROXY COMPOUNDS FROM THE GROUP CONSISTING OF THE SATURATED ALIPHATIC GLYCOLS HAVING THE TWO HYDROXY GROUPS ON THE TERMINAL CARBON ATOMS OF A STRAIGHT CARBON CHAIN AND DIETHYLENE GLYCOL, AT LEAST 50 MOL PERCENT OF SAID DIHYDROXY COMPOUNDS CONSISTING OF GLYCOLS HAVING AT LEAST FIVE CARBON ATOMS IN THE CHAIN, SAID POLYMERIC ESTERS HAVING AN INTRINSIC VISCOSITY OF AT LEASE 0.4 AT 25*C., A MICROCRYSTALINE STRUCTURE AND WHEN STRETCHED AT TEMPERATURES SUBSTANTALLY BELOW THEIR MELTING POINT BECOMING MOLECULARLY ORIENTED.
Claim 2
Dependent Claim
87 words
THE FIBER FORMING POLYMER ESTERS OF 4,4''-DICARBOXYDIPHENYLSULFONE WITH DIHYDROXY COMPOUNDS FROM THE GROUP CONSISTING OF THE SATURATED ALIPHATIC GLYCOLS HAVING THE TWO HYDROXY GROUPS ON THE TERMINAL CARBON ATOMS OF A STRAIGHT CARBON CHAIN AND DIETHYLENE GLYCOL, AT LEAST 50 MOL PERCENT OF SAID DIHYDROXY COMPOUNDS CONSISTING OF GLYCOLS HAVING AT LEAST FIVE CARBON ATOMS IN THE CHAIN, SAID POLYMERIC ESTERS HAVING AN INTRINSIC VISCOSITY OF AT LEASE 0.4 AT 25*C., A MICROCRYSTALINE STRUCTURE AND WHEN STRETCHED AT TEMPERATURES SUBSTANTALLY BELOW THEIR MELTING POINT BECOMING MOLECULARLY ORIENTED.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |