US3515580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea/salt of an acid complex and a wetting agent - antistatic composition for synthetic polymers
Assignee: WR Grace and Co
•
Filing: 1967-04-06
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Granted: 1970-06-02
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Expires: 1987-04-06
Abstract
No abstract record available.
Inventors
- 👤 Frank E Eastes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:15
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; C; C08; C08J; C08J7/00; C08J7/04; C08J7/044; C08J7/06; C08J7/065; C08K; C08K5/00; C08K5/16; C08K5/21; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2086590A
Cited
US2074880A
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US2290503A
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US2334764A
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US2357380A
Cited
US2614289A
Cited
US2597708A
Cited
US2654678A
Cited
US3348968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |