US2744879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounding butyl rubber
Assignee: Uniroyal Inc
•
Filing: 1952-01-11
•
Granted: 1956-05-08
•
Expires: 1972-01-11
Abstract
No abstract record available.
Inventors
- 👤 Elbert C Ladd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08K9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A VULCANIZATE OF A MIXTURE OF A RUBBERY ISOBUTYLENEDIOLEFIN COPOLYMER AND A FILLER SELECTED FROM THE GROUP CONSISTING OF PRECIPITATED HYDRATED SILICA, PRECIPITATED HYDRATED CALCIUM SILICATE AND KAOLIN, SAID FILLER HAVING BEEN REACTED WITH 10-UNDECENYLTRICHLOROSILANE WITH LIBERATION OF HYDROGEN CHLORIDE.
Claim 2
Dependent Claim
40 words
A VULCANIZATE OF A MIXTURE OF A RUBBERY ISOBUTYLENEDIOLEFIN COPOLYMER AND A FILLER SELECTED FROM THE GROUP CONSISTING OF PRECIPITATED HYDRATED SILICA, PRECIPITATED HYDRATED CALCIUM SILICATE AND KAOLIN, SAID FILLER HAVING BEEN REACTED WITH 10-UNDECENYLTRICHLOROSILANE WITH LIBERATION OF HYDROGEN CHLORIDE.
References Cited (Backward Citations)
US2564992A
Cited
US2610167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |