US2541498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene as a liner for tacky rubber
Assignee: Goodrich Corp
•
Filing: 1948-01-29
•
Granted: 1951-02-13
•
Expires: 1968-01-29
Abstract
No abstract record available.
Inventors
- 👤 William D Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:38
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0067; Y; Y10; Y10S; Y10S206/00; Y10S206/805; Y10S36/00; Y10S36/01; Y10T; Y10T156/00; Y10T156/11; Y10T156/1153; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
IN COMBINATION, A CONTINUOUS CALENDERED SHEET HAVING OPPOSED SURFACES COMPRISING A TACKY VULCANIZABLE RUBBER COMPOSITION AND A VULCANIZING AGENT THEREFOR, SAID SHEET BEING ROLLED UPON ITSELF, AND A CONTINUOUS PREFORMED FILM OF POLYETHYLENE HAVING A MOLECULAR WEIGHT ABOVE 6000 INTERPOSED BETWEEN ADJACENT RUBBER SURFACES IN SAID ROLL.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |