Patent US3153804A successfully refreshed from Google Patents.
US3153804A
Expired / Lapsed
US
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Reservoir marking instruments
Assignee: Mentmore Manufacturing Co Ltd
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Filing: 1963-03-08
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Granted: 1964-10-27
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Silver Derrick John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:27
CPC Classifications
B; B43; B43K; B43K5/00; B43K5/18; B43K5/1818; B43K5/1827; B43K5/1836; B43K5/1845
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A RESERVOIR MARKING INSTRUMENT COMPRISING A FELT MARKING TIP, A RESERVOIR FOR MARKING LIQUID AND A VALVE FOR PERMITTING SAID LIQUID TO FLOW TO SAID TIP WHENEVER SAID VALVE IS OPENED BY INWARD MOVEMENT OF SAID TIP, SAID VALVE COMPRISING A VALVE SEAT AND A CO-OPERATING BODY OF ELASTIC NON-METALLIC MATERIAL ENGAGED WITH SAID TIP AND INTERPOSED
References Cited (Backward Citations)
US2762337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |