US2819255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable rubber compositions and process
Assignee: Hercules Powder Co
•
Filing: 1955-05-05
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Granted: 1958-01-07
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Expires: 1975-05-05
Abstract
No abstract record available.
Inventors
- 👤 Boardman Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A RUBBER COMPOSITION COMPRISING A RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC, RUBBERY POLYMERS OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIOLEFINS AND CHLOROPRENE, AND FROM ABOUT 0.1% TO ABOUT 10% BASED ON THE WEIGHT OF RUBBER OF AN UNSYMMETRICAL PEROXIDE HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
52 words
A RUBBER COMPOSITION COMPRISING A RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND SYNTHETIC, RUBBERY POLYMERS OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIOLEFINS AND CHLOROPRENE, AND FROM ABOUT 0.1% TO ABOUT 10% BASED ON THE WEIGHT OF RUBBER OF AN UNSYMMETRICAL PEROXIDE HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US1249181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |