US2915447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin wax compositions having improved flexibility
Assignee: Shell Development Co
•
Filing: 1955-02-28
•
Granted: 1959-12-01
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Karekin G Arabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A WAX COMPOSITION COMPRISING. 70-95% BY WEIGHT OF A CONTINOUS SERIES OF NORMAL PARAFIN HYDROCARBONS HAVING FROM ABOUT 18 TO ABOUT 31 CARBON ATOMS PER MOLECULE, THE INDIVIDUAL C18-21 HYDROCARBONS BEING PRESENT IN AN AMOUNT LESS THAN ABOUT 5% BY WEIGHT EACH AND 5-30% OF NORMAL C19-21 PARAFFIN HYDROCARBONS, SAID COMPOSITION HAVING A GREATER FLEXIBILITY AT A TEMPERATURE BESERIES OF HYDROCARBONS IN THE ABSENCE OF THE ADDED C19-21 TWEEN 230*C. AND 32.1*C. THAN THAT OF THE CONTINOUS PARAFFIN HYDROCARBONS.
References Cited (Backward Citations)
US2361582A
Cited
US2394833A
Cited
US2443221A
Cited
GB621923A
Cited
US2467959A
Cited
US2668140A
Cited
US2670323A
Cited
US2756180A
Cited
US2810678A
Cited
US2761814A
Cited
US2819185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |