Patent US5245674A successfully refreshed from Google Patents.
US2643744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sash construction
Assignee: NL Industries Inc
•
Filing: 1947-01-15
•
Granted: 1953-06-30
•
Expires: 1967-01-15
Abstract
No abstract record available.
Inventors
- 👤 Theodore H Pickering
- 👤 Herbert N Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:53
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B3/04; E06B3/26; E06B3/2605; E06B3/263; E06B3/26347; E06B2003/2615; E06B2003/26349; E06B2003/26369; E06B2003/26376; E06B2003/4438; E06B2003/4453
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US724138A
Cited
US1228780A
Cited
US1391602A
Cited
US1608671A
Cited
US1845985A
Cited
US1913521A
Cited
US1974798A
Cited
US2131980A
Cited
US2128870A
Cited
US2125397A
Cited
US2219594A
Cited
US2219593A
Cited
US2357341A
Cited
US2332979A
Cited
US2343037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |