Patent US2530872A successfully refreshed from Google Patents.
US2530872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of sulfur-containing polycarboxylic acids
Assignee: Goodrich Corp
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Filing: 1947-06-18
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Granted: 1950-11-21
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Expires: 1967-06-18
Abstract
No abstract record available.
Inventors
- 👤 James T Gregory
- 👤 Jansen Jacob Eden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITION OF MATTER COMPRISING A RUBBERY COPOLYMER OF BUTADIENE-1,3 AND ACRYLONITRILE AND, AS A PLASTICIZER THEREFOR, FROM ABOUT 20 TO 30 PARTS BY WEIGHT BASED ON 100 PARTS BY WEIGHT OF THE SAID COPOLYMER OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
41 words
A COMPOSITION OF MATTER COMPRISING A RUBBERY COPOLYMER OF BUTADIENE-1,3 AND ACRYLONITRILE AND, AS A PLASTICIZER THEREFOR, FROM ABOUT 20 TO 30 PARTS BY WEIGHT BASED ON 100 PARTS BY WEIGHT OF THE SAID COPOLYMER OF A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2389489A
Cited
US2393327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |