US2537644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene emulsion in formamide, preparation thereof and process of coating therewith
Assignee: Bridgestone Firestone Inc
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Filing: 1949-04-12
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Granted: 1951-01-09
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Expires: 1969-04-12
Abstract
No abstract record available.
Inventors
- 👤 Edward L Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
PROCESS WHICH COMPRISES POLYMERIZING STYRENE IN EMULSION IN FORMAMIDE, THE STYRENE CONSTITUTING FROM 10% TO 50% OF THE EMULSION BY WEIGHT.
Claim 2
Dependent Claim
21 words
PROCESS WHICH COMPRISES POLYMERIZING STYRENE IN EMULSION IN FORMAMIDE, THE STYRENE CONSTITUTING FROM 10% TO 50% OF THE EMULSION BY WEIGHT.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |