US2637441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package
Assignee: Columbia Southern Chemical Corp
•
Filing: 1950-04-07
•
Granted: 1953-05-05
•
Expires: 1970-04-07
Abstract
No abstract record available.
Inventors
- 👤 Frank W Woodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A PACKAGE COMPRISING SOLID ANHYDROUS SODIUM HYDROXIDE IN AN NON-REUSABLE STEEL DRUM THE INTERIOR OF WHICH IS LINED WITH A NICKEL PLATE HAVING A THICKNESS OF 0.0001 TO 0.0005 INCH IN THICKNESS.
References Cited (Backward Citations)
GB191025959A
Cited
GB436229A
Cited
US2111342A
Cited
US2272609A
Cited
US2384111A
Cited
US2348549A
Cited
US2354824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |