US2723554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing self-sealing properties of sheet material
Assignee: Individual
•
Filing: 1952-12-16
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Granted: 1955-11-15
•
Expires: 1972-12-16
Abstract
No abstract record available.
Inventors
- 👤 Berlin Aaron Samuel
- 👤 Robert J Classen
- 👤 Charles F Novak
- 👤 Frank L Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:21
CPC Classifications
G; G01; G01N; G01N3/00; G01N33/00; G01N33/0078; G01N33/009; G01N2203/00; G01N2203/0058; G01N2203/0076; G01N2203/0078; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/0282; G01N2203/04; G01N2203/0482; G01N2203/0494; G01N35/00; G01N35/10; G01N35/1079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |