US2491913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compositions containing unsubstituted rosin amines
Assignee: Hercules Powder Co
•
Filing: 1946-06-01
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Granted: 1949-12-20
•
Expires: 1966-06-01
Abstract
No abstract record available.
Inventors
- 👤 Lyle O Amberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:51
CPC Classifications
C; C08; C08L; C08L7/00; C08L21/00; C08K; C08K5/00; C08K5/16; C08K5/17; C08L93/00; C08L93/04; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1784703A
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US1776857A
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US2218284A
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US2377647A
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US2367001A
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US2371736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |