Patent US3336262A successfully refreshed from Google Patents.
US3336262A
Expired / Lapsed
US
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Branched chain polyoxymethylene polycarboxylates
Assignee: Tenneco Polymers Inc
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Filing: 1965-11-05
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Granted: 1967-08-15
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Expires: 1985-11-05
Abstract
No abstract record available.
Inventors
- 👤 Sidi Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:11
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/08; C08G2/10; C08G2/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A NORMALLY SOLID, HIGH MOLECULAR WEIGHT, BRANCHED CHAIN POLYOXYMETHYLENE POLYCARBOXYLATE WHICH IS CHARACTERIZED BY A SIDI NUMBER NOT LESS THAN 1.5 WHEN COMPUTED IN ACCORDANCE WITH THE FORMULA SN=$V,IR, WHERE SN REPRESENTS THE SIDI NUMBER, $V REPRESENTS THE VISCOSIMETRICALLY DETERMINED APPARENT MOLECULAR WEIGHT OF THE POLYMER, AND $IR REPRESENTS THE IR-SPECTROPHOTOMETRICALLY DETERMINED MOLECULAR WEIGHT OF THE POLYMER CALCULATED FROM THE INTENSITY OF THE CARBONYL ABSORPTION BAND OF THE INFRARED ABSORPTION SPECTRUM OF THE POLYMER AND ASSUMING FOR THE PURPOSE OF SUCH CALCULATION THAT THE INTENSITY OF SUCH CARBONYL ABSORPTION BAND IS DUE TO THE PRESENCE OF TWO CARBOXYLATE GROUPS PER MOLECULE.
Claim 2
Dependent Claim
101 words
A NORMALLY SOLID, HIGH MOLECULAR WEIGHT, BRANCHED CHAIN POLYOXYMETHYLENE POLYCARBOXYLATE WHICH IS CHARACTERIZED BY A SIDI NUMBER NOT LESS THAN 1.5 WHEN COMPUTED IN ACCORDANCE WITH THE FORMULA SN=$V,IR, WHERE SN REPRESENTS THE SIDI NUMBER, $V REPRESENTS THE VISCOSIMETRICALLY DETERMINED APPARENT MOLECULAR WEIGHT OF THE POLYMER, AND $IR REPRESENTS THE IR-SPECTROPHOTOMETRICALLY DETERMINED MOLECULAR WEIGHT OF THE POLYMER CALCULATED FROM THE INTENSITY OF THE CARBONYL ABSORPTION BAND OF THE INFRARED ABSORPTION SPECTRUM OF THE POLYMER AND ASSUMING FOR THE PURPOSE OF SUCH CALCULATION THAT THE INTENSITY OF SUCH CARBONYL ABSORPTION BAND IS DUE TO THE PRESENCE OF TWO CARBOXYLATE GROUPS PER MOLECULE.
References Cited (Backward Citations)
US3226366A
Cited
US9999409B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |