Patent US2806823A successfully refreshed from Google Patents.
US2806823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing cellular rubber and compositions therefor
Assignee: Wyeth Holdings LLC
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Filing: 1954-12-14
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Granted: 1957-09-17
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Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Frank A V Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/108; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS OF PRODUCING A CELLULAR RUBBER PRODUCT SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND RUBBER-LIKE POLYMERS OF BUTADIENE-1,3 WHICH COMPRISES INCORPORATING INTO AN UNVULCANIZED, VULCANIZABLE RUBBER COMPOSITION A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
35 words
A PROCESS OF PRODUCING A CELLULAR RUBBER PRODUCT SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND RUBBER-LIKE POLYMERS OF BUTADIENE-1,3 WHICH COMPRISES INCORPORATING INTO AN UNVULCANIZED, VULCANIZABLE RUBBER COMPOSITION A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2588885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |