Patent US2928310A successfully refreshed from Google Patents.
US2928310A
Expired / Lapsed
US
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Device for determining color
Assignee: Proctor and Schwartz Inc
•
Filing: 1955-03-09
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Granted: 1960-03-15
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Expires: 1975-03-09
Abstract
No abstract record available.
Inventors
- 👤 John S Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:26
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J3/501
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1894132A
Cited
US2157389A
Cited
US2351932A
Cited
US2601182A
Cited
US2774276A
Cited
US2753754A
Cited
US2682801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |