US2674764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming flanged articles
Assignee: Armstrong World Industries Inc
•
Filing: 1950-10-31
•
Granted: 1954-04-13
•
Expires: 1970-10-31
Abstract
No abstract record available.
Inventors
- 👤 Eaby Le Roy
- 👤 Jr Frederick P Schmoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:08
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/224; B29C53/00; B29C53/02; B29C53/04; B29C53/043; B29C67/00; B29C67/0011; B29C69/00; B29C69/001; B29C48/00; B29C48/001; B29C48/0011; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2095/00; B29K2709/00; B29K2709/12; B29L; B29L2031/00; B29L2031/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |