US3490948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying noxious cleaning chemicals
Assignee: WR Grace and Co
•
Filing: 1966-11-17
•
Granted: 1970-01-20
•
Expires: 1986-11-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Farison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:45
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0094; C11B; C11B11/00; C11B11/005; C11D3/0052; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C11D7/08; C23; C23G; C23G3/00; C23G5/00; C11D2111/00; C11D2111/40; C11D2111/42; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141243A
Cited
US2509003A
Cited
US2563151A
Cited
GB921036A
Cited
US3018200A
Cited
US3078190A
Cited
US3037887A
Cited
US3231134A
Cited
US3247121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |