US2514218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preserving rubber
Assignee: Bridgestone Firestone Inc
•
Filing: 1946-03-20
•
Granted: 1950-07-04
•
Expires: 1966-03-20
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:03
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
NATURAL RUBBER VULCANIZATE WHICH CONTAINS AS AN ANTIFLEX-CRACKING AGENT ABOUT 0.1 TO 10 PER CENT OF AN ALKYLATED NAPHTHOL.
Claim 2
Dependent Claim
19 words
NATURAL RUBBER VULCANIZATE WHICH CONTAINS AS AN ANTIFLEX-CRACKING AGENT ABOUT 0.1 TO 10 PER CENT OF AN ALKYLATED NAPHTHOL.
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) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |