US2168993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding device for tubular envelopes
Assignee: Individual
•
Filing: 1937-05-14
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Granted: 1939-08-08
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Expires: 1957-05-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:28
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/023; B29B13/024; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C55/00; B29C55/22; B29C55/24; B29C61/00; B29C61/06; B29C61/08; B29C63/00; B29C63/38; B29C63/42; B43; B43K; B43K19/00; B43K19/16; B29C35/16; B29C2035/1616; B29C35/049
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |