US2711997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-carbonic acid esters of glycols as plasticizers for polyvinyl chloride
Assignee: BASF SE
•
Filing: 1951-10-24
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Granted: 1955-06-28
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Expires: 1971-10-24
Abstract
No abstract record available.
Inventors
- 👤 Trieschmann Hans-Georg
- 👤 Ender Willibald
- 👤 Reuter Lothar
- 👤 Froese Waldtrant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/109; C08K5/11
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
A COMPOSITION OF MATTER COMPRISING POLYVINYL CHLORIDE PLASTICIZED WITH A BIS-CARBONIC ACID ESTER OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2379252A
Cited
US2532665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |