Patent US2990013A successfully refreshed from Google Patents.
US2990013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper making machines
Assignee: BERTRAMS Ltd
•
Filing: 1955-06-22
•
Granted: 1961-06-27
•
Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Rance Herbert Frederick
- 👤 Baggallay Merrik Burrell
- 👤 Robinson William Freder Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:50
CPC Classifications
D; D21; D21F; D21F2/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1262698A
Cited
US1163251A
Cited
US1274041A
Cited
US1581656A
Cited
US1715398A
Cited
US1701226A
Cited
US1969546A
Cited
US2142711A
Cited
US2369674A
Cited
US2415351A
Cited
US2694346A
Cited
US2748671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |