Patent US2587430A successfully refreshed from Google Patents.
US2587430A
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Bonding of isobutylene-isoprene copolymer to brass
Assignee: Standard Oil Development Co
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Filing: 1946-08-03
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Granted: 1952-02-26
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Expires: 1966-08-03
Abstract
No abstract record available.
Inventors
- 👤 Francis P Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:44
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/125; C08J2323/00; C08J2323/02; C08J2323/18; C08J2323/20; C08J2323/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A LAMINAR STRUCTURE COMPRISING A BRASS SURFACE COMPOSED OF ABOUT 70% COPPER AND ABOUT 30% ZINC AND A LAMINA ADHERENT THERETO COMPRISING A POLYMER WHICH CONSISTS ESSENTIALLY OF 90 TO 98% OF COMBINED ISOBUTYLENE AND 10 TO 2% OF A COMBINED MULTIOLEFIN HAVING 4 TO 14 CARBON ATOMS PER MOLECULE, THE SAID LAMINA ALSO CONTAINING A SULFUR-CONTAINING CURING AGENT.
Claim 2
Dependent Claim
67 words
A PROCESS FOR ADHERING AN ISOBUTYLENE CONTAINING POLYMER TO BRASS CONSISTING OF 70% COPPER AND 30% ZINC, THE PROCESS COMPRISING THE STEPS OF COPOLYMERIZING WITH THE ISOBUTYLENE FROM 2% TO 10% OF ISOPRENE TO FORM A COPOLYMER, CLEANING A BRASS SURFACE TO REMOVE GREASE AND OXIDE, APPLYING THERETO A SOLUTION OF SAID COPOLYMER CONTAINING A SULFUR CURING AGENT AND CURING THE POLYMER IN CONTACT WITH THE BRASS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |