Patent US2572979A successfully refreshed from Google Patents.
US2572979A
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Curtain stretcher
Assignee: WORLDSBEST IND Inc
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Filing: 1947-09-04
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Granted: 1951-10-30
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Expires: 1967-09-04
Abstract
No abstract record available.
Inventors
- 👤 Werner H Bothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
D; D06; D06F; D06F59/00; D06F59/08; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US579277A
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US749702A
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US676895A
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US670589A
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US815382A
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US991781A
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US1088547A
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US2217003A
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US2279647A
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US2250057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |