Patent US3525156A successfully refreshed from Google Patents.
US3525156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting device
Assignee: Individual
•
Filing: 1969-01-02
•
Granted: 1970-08-25
•
Expires: 1989-01-02
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:38
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04; B43L13/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |