US3538533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nap raising device
Assignee: Individual
•
Filing: 1969-06-16
•
Granted: 1970-11-10
•
Expires: 1989-06-16
Abstract
No abstract record available.
Inventors
- 👤 John A Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:29
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE31992C
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US433006A
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US436744A
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GB189516288A
Cited
US778662A
Cited
US961992A
Cited
US1971726A
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US2084603A
Cited
GB640717A
Cited
US2679084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |