US2229534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of compounding rubber
Assignee: Wingfoot Corp
•
Filing: 1937-09-24
•
Granted: 1941-01-21
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Expires: 1957-09-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/212; C08L; C08L7/00; C08J2307/00; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/34; C08L5/00; C08L89/00; C08L89/005; Y; Y10; Y10S; Y10S524/00; Y10S524/925
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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |