US2821161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for applying a pressure sealing gum to envelopes and similar workpieces
Assignee: Berkley Machine Co
•
Filing: 1954-12-01
•
Granted: 1958-01-28
•
Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 Winkler Richard
- 👤 Dunnebier Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/62; B31B2150/00; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1545443A
Cited
US1672842A
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US1741382A
Cited
US2000325A
Cited
US2130241A
Cited
US2344427A
Cited
US2438788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |