Patent US2552335A successfully refreshed from Google Patents.
US2552335A
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US
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Counterpoise mechanism for drafting machines
Assignee: UNIVERSAL DRAFTING MACHINE CORP
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Filing: 1944-09-22
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Granted: 1951-05-08
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Expires: 1964-09-22
Abstract
No abstract record available.
Inventors
- 👤 Little Charles Hubbard
- 👤 Little Nan Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:11
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04; B43L13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1003765A
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US1843424A
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DE596648C
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US2164216A
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US2350358A
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GB503102A
Cited
US2228140A
Cited
US2316485A
Cited
US2256445A
Cited
US2374020A
Cited
US2362050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |