Patent US3501787A successfully refreshed from Google Patents.
US3501787A
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US
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Double sail sheet
Assignee: LOUISE M NUNN
•
Filing: 1967-08-01
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Granted: 1970-03-24
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Expires: 1987-08-01
Abstract
No abstract record available.
Inventors
- 👤 Louise M Nunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:53
CPC Classifications
A; A47; A47C; A47C31/00; A47C31/10; A47C31/105; A47G; A47G9/00; A47G9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1988566A
Cited
US2870463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |