Patent US2991329A successfully refreshed from Google Patents.
US2991329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically actuated remote writing instrument
Assignee: Individual
•
Filing: 1955-05-23
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Granted: 1961-07-04
•
Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Weingart Ben
- 👤 Jack H Zillman
- 👤 La Vergne L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:41
CPC Classifications
G; G08; G08C; G08C21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US684579A
Cited
US2094039A
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US2463931A
Cited
US2604075A
Cited
US2546628A
Cited
US2590294A
Cited
US2623943A
Cited
US2655903A
Cited
US2697417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |