US2539931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frothed latex sponge rubber
Assignee: Wingfoot Corp
•
Filing: 1948-03-26
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Granted: 1951-01-30
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Expires: 1968-03-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas H Rogers
- 👤 Newell R Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/35; C08J2321/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
34 words
A FROTHED RUBBERY POLYDIOLEFIN LATEX SPONGE CONTAINING FROM ABOUT 10% TO ABOUT 40%, BASED ON THE WEIGHT OF RUBBER PRESENT, OF FROTHED RUBBER LATEX SPONGE PARTICLES OF ABOUT 35 MESH TP ABOUT 50 MESH.
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) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |