US3499902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic hydrazone compound containing azo coupler moiety
Assignee: 3M Co
•
Filing: 1967-08-09
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Granted: 1970-03-10
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Expires: 1987-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert F Coles
- 👤 Richard A Miller
- 👤 Vsevolod Tulagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/54; C07D263/58; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/30; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82
Claims Analysis
Total Claims: 0
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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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |