Patent US2444546A successfully refreshed from Google Patents.
US2444546A
Expired / Lapsed
US
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Vulcanization of chloroprene elastomers in the presence of dinitrosobenzene and catechol
Assignee: EIDP Inc
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Filing: 1945-04-24
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Granted: 1948-07-06
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Expires: 1965-04-24
Abstract
No abstract record available.
Inventors
- 👤 Walsh Robert Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/32; C08J2321/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |