US3375588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting machine attachment
Assignee: GEORGE M PELHAM
•
Filing: 1965-12-13
•
Granted: 1968-04-02
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 George M Pelham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:59
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1145922A
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US1154673A
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US1821369A
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US2428699A
Cited
US2742705A
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US2842849A
Cited
US2932897A
Cited
US3103747A
Cited
US3279074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |