US2874068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for lacquering rubber articles
Assignee: Bayer AG
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Filing: 1955-05-18
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Granted: 1959-02-17
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Expires: 1975-05-18
Abstract
No abstract record available.
Inventors
- 👤 Spulak Franz Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J2321/00; C08J2475/00; Y; Y10; Y10S; Y10S8/00; Y10S8/11; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31569; Y10T428/31826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR LACQUERING RUBBER WHICH COMPRISES INITIALLY TREATING THE RUBBER WITH A SOLUTION OF A POLYFUNCTIONAL ISOCYANATE, EVAPORATING THE SOLVENT FROM SAID SOLUTION, APPLYING A SOLUTION OF A HYDROXYL POLYESTER HAVING AN HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 450 AND AN ACID NUMBER OF FROM ZERO TO ABOUT 40 TO SAID TREATED ARTICLE AND EFFECTING A REACTION BETWEEN SAID ISOCYANATE AND SAID HYDROXYL POLYESTER.
Claim 2
Dependent Claim
67 words
A PROCESS FOR LACQUERING RUBBER WHICH COMPRISES INITIALLY TREATING THE RUBBER WITH A SOLUTION OF A POLYFUNCTIONAL ISOCYANATE, EVAPORATING THE SOLVENT FROM SAID SOLUTION, APPLYING A SOLUTION OF A HYDROXYL POLYESTER HAVING AN HYDROXYL NUMBER OF FROM ABOUT 30 TO ABOUT 450 AND AN ACID NUMBER OF FROM ZERO TO ABOUT 40 TO SAID TREATED ARTICLE AND EFFECTING A REACTION BETWEEN SAID ISOCYANATE AND SAID HYDROXYL POLYESTER.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |