US2880070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of indicating acidity and alkalinity
Assignee: Honeywell International Inc
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Filing: 1955-11-29
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Granted: 1959-03-31
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Everett E Gilbert
- 👤 Charles B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:45
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N21/80; G01N31/00; G01N31/22; G01N31/221; Y; Y10; Y10T; Y10T436/00; Y10T436/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF CHANGING THE PH OF A SOLUTION CONTAINING A FIRST COMPONENT OF A COMPLEMENTARY ACID-BASE SYSTEM BY ADDITION THERETO OF CONTROLLED AMOUNTS OF THE SECOND COMPONENT WHICH COMPRISES PACING IN CONTACT WITH SAID SOLUTION A SOLID SURFACE OF POLYETHYLENE WHICH HAS BEEN TREATED WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) FLUOROSULFONIC ACID AND (B) SULFUR TRIOXIDE IN TETRACHLOROETHYLENE, ADDING SAID SECOND COMPONENT TO SAID SOLUTION, AND CONTROLLING THE ADDITION OF SAID SECOND COMPONENT IN ACCORDANCE WITH THE COLOR OF SAID SURFACE.
Claim 2
Independent Claim
86 words
THE METHOD OF CHANGING THE PH OF A SOLUTION CONTAINING A FIRST COMPONENT OF A COMPLEMENTARY ACID-BASE SYSTEM BY ADDITION THERETO OF CONTROLLED AMOUNTS OF THE SECOND COMPONENT WHICH COMPRISES PACING IN CONTACT WITH SAID SOLUTION A SOLID SURFACE OF POLYETHYLENE WHICH HAS BEEN TREATED WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) FLUOROSULFONIC ACID AND (B) SULFUR TRIOXIDE IN TETRACHLOROETHYLENE, ADDING SAID SECOND COMPONENT TO SAID SOLUTION, AND CONTROLLING THE ADDITION OF SAID SECOND COMPONENT IN ACCORDANCE WITH THE COLOR OF SAID SURFACE.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |