Patent US3490467A successfully refreshed from Google Patents.
US3490467A
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Method of monitoring and maintaining concentration of depletable work solutions
Assignee: Intercontinental Chemical Corp
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Filing: 1967-02-23
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Granted: 1970-01-20
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Expires: 1987-02-23
Abstract
No abstract record available.
Inventors
- 👤 William H Gore
- 👤 Paul E Leising
- 👤 Edward B Tooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
C; C23; C23G; C23G1/00; A; A47; A47L; A47L15/00; A47L15/0018; A47L15/0049; A47L15/0055; C23C; C23C22/00; C23C22/73; C23C22/77; A47L15/24; A47L15/241; A47L15/42; A47L15/44; A47L15/4418; A47L2401/00; A47L2401/02; A47L2401/023; A47L2401/30; A47L2501/00; A47L2501/07; A47L2501/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1885201A
Cited
US2585172A
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US2697673A
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US3019799A
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US3136903A
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US3134070A
Cited
US3094247A
Cited
US3195551A
Cited
US3139890A
Cited
US3221936A
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 |