US2227809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making porous rubber articles
Assignee: Bridgestone Firestone Inc
•
Filing: 1937-02-11
•
Granted: 1941-01-07
•
Expires: 1957-02-11
Abstract
No abstract record available.
Inventors
- 👤 Harold W Greenup
- 👤 Baynard R Whaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0033; C08L; C08L21/00; C08J2321/00; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1944-01-07 | 1944-07-08 | 1945-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-07 | 1948-07-08 | 1949-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-07 | 1952-07-08 | 1953-01-07 | $7700.00 | Window Closed / Lapsed |