US3497132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope construction
Assignee: Individual
•
Filing: 1968-02-12
•
Granted: 1970-02-24
•
Expires: 1988-02-12
Abstract
No abstract record available.
Inventors
- 👤 Beulah Louis Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:36
CPC Classifications
B; B42; B42D; B42D5/00; B42D5/02; B42D5/023; B42D5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1823362A
Cited
US2299751A
Cited
US2610784A
Cited
US2722369A
Cited
US2969003A
Cited
US2895534A
Cited
US3111257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |