US3464775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marking element and method of making same
Assignee: Sanford Research Co
•
Filing: 1967-09-06
•
Granted: 1969-09-02
•
Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Keith F Beal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:30
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2688380A
Cited
US2870471A
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US2891272A
Cited
US3190294A
Cited
US3003181A
Cited
US3094736A
Cited
US3203025A
Cited
US3111702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |