Patent NL6708451A successfully refreshed from Google Patents.
Patent US2427879A successfully refreshed from Google Patents.
US2427879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural product
Assignee: United States Gypsum Co
•
Filing: 1943-12-22
•
Granted: 1947-09-23
•
Expires: 1963-12-22
Abstract
No abstract record available.
Inventors
- 👤 John A Robertson
- 👤 Thomas P Camp
- 👤 Chester N Kolmodin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:30
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1333579A
Cited
US1584148A
Cited
US1474657A
Cited
GB353910A
Cited
US2039536A
Cited
US2021578A
Cited
US2089087A
Cited
US2266746A
Cited
US2296553A
Cited
US2273040A
Cited
US2310391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |