Patent US2835987A successfully refreshed from Google Patents.
US2835987A
Expired / Lapsed
US
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Mechanical drawing component
Assignee: Individual
•
Filing: 1955-01-12
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Granted: 1958-05-27
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Expires: 1975-01-12
Abstract
No abstract record available.
Inventors
- 👤 Elmer F Heiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:25
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/20; B43L13/201; B43L13/206; Y; Y10; Y10S; Y10S430/00; Y10S430/152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1521491A
Cited
US1627407A
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US1942339A
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US2149779A
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US2221609A
Cited
US2168793A
Cited
US2503126A
Cited
US2670961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |