Patent US2934450A successfully refreshed from Google Patents.
US2934450A
Expired / Lapsed
US
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Chromium complexes of fluorocarbon acids and articles coated therewith
Assignee: 3M Co
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Filing: 1955-12-29
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Granted: 1960-04-26
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Harvey A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/12; C; C07; C07F; C07F11/00; C07F11/005; C14; C14C; C14C11/00; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/438
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
GREEN-COLORED WATER - SOLUBLE CHLORINE - CONTAINING CHROMIUM COORDINATION COMPLEXES OF PERFLUOROALKANESULFONAMIDO ALKYLENEMONOCARBOXYLIC ACIDS THAT HAVE THE FORMULA:
Claim 2
Dependent Claim
18 words
GREEN-COLORED WATER - SOLUBLE CHLORINE - CONTAINING CHROMIUM COORDINATION COMPLEXES OF PERFLUOROALKANESULFONAMIDO ALKYLENEMONOCARBOXYLIC ACIDS THAT HAVE THE FORMULA:
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |