US3439839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealant dispensing device
Assignee: Product Research and Chemical Corp
•
Filing: 1965-09-16
•
Granted: 1969-04-22
•
Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Schumann
- 👤 Paul J Stayboldt
- 👤 Ralph J Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:55
CPC Classifications
B; B05; B05C; B05C17/00; B05C17/005; B05C17/00503; B05C17/00516; B05C17/00573; B05C17/00583; B05C17/00596; B05C17/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418263A
Cited
GB660031A
Cited
US2784878A
Cited
GB809161A
Cited
US2884166A
Cited
US3136456A
Cited
US3282473A
Cited
US3221947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |