US2581939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for electronic vulcanization
Assignee: Bridgestone Firestone Inc
•
Filing: 1947-07-05
•
Granted: 1952-01-08
•
Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Deist Herbert Henry
- 👤 Fred H Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; B; B29; B29C; B29C33/00; B29C33/02; B29C33/08; B29C33/56; B29C33/565; B29K; B29K2021/00; B29K2909/00; B29K2909/08; B29K2911/00; B29K2911/14; B29L; B29L2030/00; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |