US2728475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure
Assignee: Mallinckrodt Chemical Works
•
Filing: 1952-10-09
•
Granted: 1955-12-27
•
Expires: 1972-10-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B Teeters
- 👤 Marty Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US849352A
Cited
US957064A
Cited
GB191216555A
Cited
US1657772A
Cited
GB343439A
Cited
US1937492A
Cited
US2580546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |