Patent US767258A successfully refreshed from Google Patents.
US2633641A
Expired / Lapsed
US
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Plastic folding ruler
Assignee: Sterling Plastics Co
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Filing: 1951-05-24
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Granted: 1953-04-07
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jack F Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:27
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/02; G01B3/04; G01B3/06; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32401
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US239437A
Cited
US2515622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |