Patent US2434465A successfully refreshed from Google Patents.
Patent US2550438A successfully refreshed from Google Patents.
US2550438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized paraffin wax
Assignee: Standard Oil Development Co
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Filing: 1947-03-07
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Granted: 1951-04-24
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Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
- 👤 Herman J Zoeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A REFINED COLORLESS PARAFFIN WAX OF A MELTING POINT OF ABOUT 132* F. WHICH HAS BEEN TREATED WITH CONCENTRATED SULFURIC ACID AND HAS INCORPORATED THEREIN ABOUT 0.001 TO ABOUT 0.05% OF A POLYDIMETHYL SILOXANE HAVING THE FOLLOWING PROP ERTIES:
Claim 2
Dependent Claim
39 words
A REFINED COLORLESS PARAFFIN WAX OF A MELTING POINT OF ABOUT 132* F. WHICH HAS BEEN TREATED WITH CONCENTRATED SULFURIC ACID AND HAS INCORPORATED THEREIN ABOUT 0.001 TO ABOUT 0.05% OF A POLYDIMETHYL SILOXANE HAVING THE FOLLOWING PROP ERTIES:
References Cited (Backward Citations)
US2383521A
Cited
US2416504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |