US3387916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heteropoly acid coloration medium and process
Assignee: EIDP Inc
•
Filing: 1964-06-23
•
Granted: 1968-06-11
•
Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Clarke Ray Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:11
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/655; D06P1/66; C; C09; C09B; C09B69/00; C09B69/02; C09B69/06; D06P3/00; D06P3/34; D06P3/52; D06P3/522; D06P3/70; D06P3/76
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1848589A
Cited
US2989361A
Cited
US2192956A
Cited
US2215196A
Cited
US2589953A
Cited
US2922690A
Cited
US3107968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |