US2843643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber containing demethylated wood tar distillate
Assignee: Universal Oil Products Co
•
Filing: 1956-05-14
•
Granted: 1958-07-15
•
Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 William K T Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:12
CPC Classifications
C; C08; C08L; C08L7/00; C08L21/00; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A RUBBER NORMALLY SUBJECT TO CRACKING DUE TO OZOSNE CONTAINING FROM ABOUT 0.25% TO ABOUT 10% BY WEIGHT OF DEMETHYLATED WOOD TAR DISTILLATE AS A RETARDER OF SAID CRACKING.
Claim 2
Dependent Claim
29 words
A RUBBER NORMALLY SUBJECT TO CRACKING DUE TO OZOSNE CONTAINING FROM ABOUT 0.25% TO ABOUT 10% BY WEIGHT OF DEMETHYLATED WOOD TAR DISTILLATE AS A RETARDER OF SAID CRACKING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |