US2930222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated interlocking structural slabs
Assignee: Individual
•
Filing: 1955-11-14
•
Granted: 1960-03-29
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Robert D Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:04
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/22; E04H7/24; E04H7/26; E04H7/28; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/06; E04B2/08; E04B2002/0202; E04B2002/0204; E04B2002/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US755749A
Cited
US761711A
Cited
US1514081A
Cited
US1297960A
Cited
US1367497A
Cited
US1420810A
Cited
US1425166A
Cited
US1708162A
Cited
US2309149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |