US2207229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile sizing
Assignee: National Oil Products Co
•
Filing: 1938-03-05
•
Granted: 1940-07-09
•
Expires: 1958-03-05
Abstract
No abstract record available.
Inventors
- 👤 Laurence R Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/224; D06M7/00; D06M2200/00; D06M2200/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-07-09 | 1944-01-08 | 1944-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-09 | 1948-01-08 | 1948-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-09 | 1952-01-08 | 1952-07-09 | $7700.00 | Window Closed / Lapsed |